Linux : sysctl

# sysctl -a
abi.vsyscall32 = 1
crypto.fips_enabled = 0
debug.exception-trace = 1
debug.kprobes-optimization = 1
dev.cdrom.autoclose = 1
dev.cdrom.autoeject = 0
dev.cdrom.check_media = 0
dev.cdrom.debug = 0
dev.cdrom.info = CD-ROM information, Id: cdrom.c 3.20 2003/12/17
dev.cdrom.info =
dev.cdrom.info = drive name:            sr1     sr0
dev.cdrom.info = drive speed:           32      32
dev.cdrom.info = drive # of slots:      1       1
dev.cdrom.info = Can close tray:                1       1
dev.cdrom.info = Can open tray:         1       1
dev.cdrom.info = Can lock tray:         1       1
dev.cdrom.info = Can change speed:      1       1
dev.cdrom.info = Can select disk:       0       0
dev.cdrom.info = Can read multisession: 1       1
dev.cdrom.info = Can read MCN:          1       1
dev.cdrom.info = Reports media changed: 1       1
dev.cdrom.info = Can play audio:                1       1
dev.cdrom.info = Can write CD-R:                0       0
dev.cdrom.info = Can write CD-RW:       0       0
dev.cdrom.info = Can read DVD:          1       1
dev.cdrom.info = Can write DVD-R:       0       0
dev.cdrom.info = Can write DVD-RAM:     0       0
dev.cdrom.info = Can read MRW:          1       1
dev.cdrom.info = Can write MRW:         1       1
dev.cdrom.info = Can write RAM:         1       1
dev.cdrom.info =
dev.cdrom.info =
dev.cdrom.lock = 1
dev.hpet.max-user-freq = 64
dev.mac_hid.mouse_button2_keycode = 97
dev.mac_hid.mouse_button3_keycode = 100
dev.mac_hid.mouse_button_emulation = 0
dev.parport.default.spintime = 500
dev.parport.default.timeslice = 200
dev.raid.speed_limit_max = 200000
dev.raid.speed_limit_min = 1000
dev.scsi.logging_level = 0
fs.aio-max-nr = 65536
fs.aio-nr = 0
fs.binfmt_misc.status = enabled
fs.dentry-state = 51970 37588   45      0       0       0
fs.dir-notify-enable = 1
fs.epoll.max_user_watches = 151121
fs.file-max = 73458
fs.file-nr = 1280       0       73458
fs.inode-nr = 72979     25803
fs.inode-state = 72979  25803   0       0       0       0       0
fs.inotify.max_queued_events = 16384
fs.inotify.max_user_instances = 128
fs.inotify.max_user_watches = 8192
fs.lease-break-time = 45
fs.leases-enable = 1
fs.mqueue.msg_default = 10
fs.mqueue.msg_max = 10
fs.mqueue.msgsize_default = 8192
fs.mqueue.msgsize_max = 8192
fs.mqueue.queues_max = 256
fs.nfs.nlm_grace_period = 0
fs.nfs.nlm_tcpport = 0
fs.nfs.nlm_timeout = 10
fs.nfs.nlm_udpport = 0
fs.nfs.nsm_local_state = 0
fs.nfs.nsm_use_hostnames = 0
fs.nr_open = 1048576
fs.overflowgid = 65534
fs.overflowuid = 65534
fs.pipe-max-size = 1048576
fs.protected_hardlinks = 1
fs.protected_symlinks = 1
fs.quota.allocated_dquots = 0
fs.quota.cache_hits = 0
fs.quota.drops = 0
fs.quota.free_dquots = 0
fs.quota.lookups = 0
fs.quota.reads = 0
fs.quota.syncs = 0
fs.quota.writes = 0
fs.suid_dumpable = 0
fs.xfs.error_level = 3
fs.xfs.filestream_centisecs = 3000
fs.xfs.inherit_noatime = 1
fs.xfs.inherit_nodefrag = 1
fs.xfs.inherit_nodump = 1
fs.xfs.inherit_nosymlinks = 0
fs.xfs.inherit_sync = 1
fs.xfs.irix_sgid_inherit = 0
fs.xfs.irix_symlink_mode = 0
fs.xfs.panic_mask = 0
fs.xfs.rotorstep = 1
fs.xfs.speculative_prealloc_lifetime = 300
fs.xfs.stats_clear = 0
fs.xfs.xfssyncd_centisecs = 3000
kernel.acct = 4 2       30
kernel.acpi_video_flags = 0
kernel.auto_msgmni = 0
kernel.bootloader_type = 114
kernel.bootloader_version = 2
kernel.cad_pid = 1
kernel.cap_last_cap = 37
kernel.compat-log = 1
kernel.core_pattern = |/usr/libexec/abrt-hook-ccpp %s %c %p %u %g %t %e %P %I
kernel.core_pipe_limit = 4
kernel.core_uses_pid = 1
kernel.ctrl-alt-del = 0
kernel.dmesg_restrict = 0
kernel.domainname = (none)
kernel.ftrace_dump_on_oops = 0
kernel.ftrace_enabled = 1
kernel.hostname = localhost.localdomain
kernel.io_delay_type = 0
kernel.kexec_load_disabled = 0
kernel.keys.gc_delay = 300
kernel.keys.maxbytes = 20000
kernel.keys.maxkeys = 200
kernel.keys.persistent_keyring_expiry = 259200
kernel.keys.root_maxbytes = 25000000
kernel.keys.root_maxkeys = 1000000
kernel.kptr_restrict = 0
kernel.kstack_depth_to_print = 12
kernel.latencytop = 0
kernel.max_lock_depth = 1024
kernel.modprobe = /sbin/modprobe
kernel.modules_disabled = 0
kernel.msg_next_id = -1
kernel.msgmax = 8192
kernel.msgmnb = 16384
kernel.msgmni = 32000
kernel.ngroups_max = 65536
kernel.nmi_watchdog = 0
kernel.ns_last_pid = 26186
kernel.numa_balancing = 0
kernel.numa_balancing_scan_delay_ms = 1000
kernel.numa_balancing_scan_period_max_ms = 60000
kernel.numa_balancing_scan_period_min_ms = 1000
kernel.numa_balancing_scan_size_mb = 256
kernel.osrelease = 4.2.3-300.fc23.x86_64
kernel.ostype = Linux
kernel.overflowgid = 65534
kernel.overflowuid = 65534
kernel.panic = 0
kernel.panic_on_io_nmi = 0
kernel.panic_on_oops = 0
kernel.panic_on_stackoverflow = 0
kernel.panic_on_unrecovered_nmi = 0
kernel.panic_on_warn = 0
kernel.perf_cpu_time_max_percent = 25
kernel.perf_event_max_sample_rate = 100000
kernel.perf_event_mlock_kb = 516
kernel.perf_event_paranoid = 1
kernel.pid_max = 32768
kernel.poweroff_cmd = /sbin/poweroff
kernel.print-fatal-signals = 0
kernel.printk = 4       4       1       7
kernel.printk_delay = 0
kernel.printk_ratelimit = 5
kernel.printk_ratelimit_burst = 10
kernel.pty.max = 4096
kernel.pty.nr = 3
kernel.pty.reserve = 1024
kernel.random.boot_id = c7c34322-49ce-4149-93c4-0f4c66882337
kernel.random.entropy_avail = 3092
kernel.random.poolsize = 4096
kernel.random.read_wakeup_threshold = 64
kernel.random.urandom_min_reseed_secs = 60
kernel.random.uuid = a1f9b39b-89ea-483a-bafe-ab21d1e94d74
kernel.random.write_wakeup_threshold = 3072
kernel.randomize_va_space = 2
kernel.real-root-dev = 0
kernel.sched_autogroup_enabled = 1
kernel.sched_cfs_bandwidth_slice_us = 5000
kernel.sched_child_runs_first = 0
kernel.sched_latency_ns = 6000000
kernel.sched_migration_cost_ns = 500000
kernel.sched_min_granularity_ns = 750000
kernel.sched_nr_migrate = 32
kernel.sched_rr_timeslice_ms = 100
kernel.sched_rt_period_us = 1000000
kernel.sched_rt_runtime_us = 950000
kernel.sched_shares_window_ns = 10000000
kernel.sched_time_avg_ms = 1000
kernel.sched_tunable_scaling = 1
kernel.sched_wakeup_granularity_ns = 1000000
kernel.sem = 32000      1024000000      500     32000
kernel.sem_next_id = -1
kernel.sg-big-buff = 32768
kernel.shm_next_id = -1
kernel.shm_rmid_forced = 0
kernel.shmall = 18446744073692774399
kernel.shmmax = 18446744073692774399
kernel.shmmni = 4096
kernel.soft_watchdog = 1
kernel.softlockup_all_cpu_backtrace = 0
kernel.softlockup_panic = 0
kernel.stack_tracer_enabled = 0
kernel.sysctl_writes_strict = 0
kernel.sysrq = 16
kernel.tainted = 0
kernel.threads-max = 5764
kernel.timer_migration = 1
kernel.traceoff_on_warning = 0
kernel.tracepoint_printk = 0
kernel.unknown_nmi_panic = 0
kernel.usermodehelper.bset = 4294967295 63
kernel.usermodehelper.inheritable = 4294967295  63
kernel.version = #1 SMP Mon Oct 5 15:42:54 UTC 2015
kernel.watchdog = 1
kernel.watchdog_cpumask = 0
kernel.watchdog_thresh = 10
kernel.yama.ptrace_scope = 0
net.core.bpf_jit_enable = 0
net.core.busy_poll = 0
net.core.busy_read = 0
net.core.default_qdisc = fq_codel
net.core.dev_weight = 64
net.core.flow_limit_cpu_bitmap = 0
net.core.flow_limit_table_len = 4096
net.core.message_burst = 10
net.core.message_cost = 5
net.core.netdev_budget = 300
net.core.netdev_max_backlog = 1000
net.core.netdev_rss_key = 00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00
net.core.netdev_tstamp_prequeue = 1
net.core.optmem_max = 20480
net.core.rmem_default = 212992
net.core.rmem_max = 212992
net.core.rps_sock_flow_entries = 0
net.core.somaxconn = 128
net.core.tstamp_allow_data = 1
net.core.warnings = 0
net.core.wmem_default = 212992
net.core.wmem_max = 212992
net.core.xfrm_acq_expires = 30
net.core.xfrm_aevent_etime = 10
net.core.xfrm_aevent_rseqth = 2
net.core.xfrm_larval_drop = 1
net.ipv4.cipso_cache_bucket_size = 10
net.ipv4.cipso_cache_enable = 1
net.ipv4.cipso_rbm_optfmt = 0
net.ipv4.cipso_rbm_strictvalid = 1
net.ipv4.conf.all.accept_local = 0
net.ipv4.conf.all.accept_redirects = 1
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.all.arp_accept = 0
net.ipv4.conf.all.arp_announce = 0
net.ipv4.conf.all.arp_filter = 0
net.ipv4.conf.all.arp_ignore = 0
net.ipv4.conf.all.arp_notify = 0
net.ipv4.conf.all.bootp_relay = 0
net.ipv4.conf.all.disable_policy = 0
net.ipv4.conf.all.disable_xfrm = 0
net.ipv4.conf.all.force_igmp_version = 0
net.ipv4.conf.all.forwarding = 0
net.ipv4.conf.all.igmpv2_unsolicited_report_interval = 10000
net.ipv4.conf.all.igmpv3_unsolicited_report_interval = 1000
net.ipv4.conf.all.ignore_routes_with_linkdown = 0
net.ipv4.conf.all.log_martians = 0
net.ipv4.conf.all.mc_forwarding = 0
net.ipv4.conf.all.medium_id = 0
net.ipv4.conf.all.promote_secondaries = 1
net.ipv4.conf.all.proxy_arp = 0
net.ipv4.conf.all.proxy_arp_pvlan = 0
net.ipv4.conf.all.route_localnet = 0
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.all.secure_redirects = 1
net.ipv4.conf.all.send_redirects = 1
net.ipv4.conf.all.shared_media = 1
net.ipv4.conf.all.src_valid_mark = 0
net.ipv4.conf.all.tag = 0
net.ipv4.conf.default.accept_local = 0
net.ipv4.conf.default.accept_redirects = 1
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.conf.default.arp_accept = 0
net.ipv4.conf.default.arp_announce = 0
net.ipv4.conf.default.arp_filter = 0
net.ipv4.conf.default.arp_ignore = 0
net.ipv4.conf.default.arp_notify = 0
net.ipv4.conf.default.bootp_relay = 0
net.ipv4.conf.default.disable_policy = 0
net.ipv4.conf.default.disable_xfrm = 0
net.ipv4.conf.default.force_igmp_version = 0
net.ipv4.conf.default.forwarding = 0
net.ipv4.conf.default.igmpv2_unsolicited_report_interval = 10000
net.ipv4.conf.default.igmpv3_unsolicited_report_interval = 1000
net.ipv4.conf.default.ignore_routes_with_linkdown = 0
net.ipv4.conf.default.log_martians = 0
net.ipv4.conf.default.mc_forwarding = 0
net.ipv4.conf.default.medium_id = 0
net.ipv4.conf.default.promote_secondaries = 1
net.ipv4.conf.default.proxy_arp = 0
net.ipv4.conf.default.proxy_arp_pvlan = 0
net.ipv4.conf.default.route_localnet = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.secure_redirects = 1
net.ipv4.conf.default.send_redirects = 1
net.ipv4.conf.default.shared_media = 1
net.ipv4.conf.default.src_valid_mark = 0
net.ipv4.conf.default.tag = 0
net.ipv4.conf.enp0s3.accept_local = 0
net.ipv4.conf.enp0s3.accept_redirects = 1
net.ipv4.conf.enp0s3.accept_source_route = 0
net.ipv4.conf.enp0s3.arp_accept = 0
net.ipv4.conf.enp0s3.arp_announce = 0
net.ipv4.conf.enp0s3.arp_filter = 0
net.ipv4.conf.enp0s3.arp_ignore = 0
net.ipv4.conf.enp0s3.arp_notify = 0
net.ipv4.conf.enp0s3.bootp_relay = 0
net.ipv4.conf.enp0s3.disable_policy = 0
net.ipv4.conf.enp0s3.disable_xfrm = 0
net.ipv4.conf.enp0s3.force_igmp_version = 0
net.ipv4.conf.enp0s3.forwarding = 0
net.ipv4.conf.enp0s3.igmpv2_unsolicited_report_interval = 10000
net.ipv4.conf.enp0s3.igmpv3_unsolicited_report_interval = 1000
net.ipv4.conf.enp0s3.ignore_routes_with_linkdown = 0
net.ipv4.conf.enp0s3.log_martians = 0
net.ipv4.conf.enp0s3.mc_forwarding = 0
net.ipv4.conf.enp0s3.medium_id = 0
net.ipv4.conf.enp0s3.promote_secondaries = 1
net.ipv4.conf.enp0s3.proxy_arp = 0
net.ipv4.conf.enp0s3.proxy_arp_pvlan = 0
net.ipv4.conf.enp0s3.route_localnet = 0
net.ipv4.conf.enp0s3.rp_filter = 1
net.ipv4.conf.enp0s3.secure_redirects = 1
net.ipv4.conf.enp0s3.send_redirects = 1
net.ipv4.conf.enp0s3.shared_media = 1
net.ipv4.conf.enp0s3.src_valid_mark = 0
net.ipv4.conf.enp0s3.tag = 0
net.ipv4.conf.lo.accept_local = 0
net.ipv4.conf.lo.accept_redirects = 1
net.ipv4.conf.lo.accept_source_route = 1
net.ipv4.conf.lo.arp_accept = 0
net.ipv4.conf.lo.arp_announce = 0
net.ipv4.conf.lo.arp_filter = 0
net.ipv4.conf.lo.arp_ignore = 0
net.ipv4.conf.lo.arp_notify = 0
net.ipv4.conf.lo.bootp_relay = 0
net.ipv4.conf.lo.disable_policy = 1
net.ipv4.conf.lo.disable_xfrm = 1
net.ipv4.conf.lo.force_igmp_version = 0
net.ipv4.conf.lo.forwarding = 0
net.ipv4.conf.lo.igmpv2_unsolicited_report_interval = 10000
net.ipv4.conf.lo.igmpv3_unsolicited_report_interval = 1000
net.ipv4.conf.lo.ignore_routes_with_linkdown = 0
net.ipv4.conf.lo.log_martians = 0
net.ipv4.conf.lo.mc_forwarding = 0
net.ipv4.conf.lo.medium_id = 0
net.ipv4.conf.lo.promote_secondaries = 0
net.ipv4.conf.lo.proxy_arp = 0
net.ipv4.conf.lo.proxy_arp_pvlan = 0
net.ipv4.conf.lo.route_localnet = 0
net.ipv4.conf.lo.rp_filter = 0
net.ipv4.conf.lo.secure_redirects = 1
net.ipv4.conf.lo.send_redirects = 1
net.ipv4.conf.lo.shared_media = 1
net.ipv4.conf.lo.src_valid_mark = 0
net.ipv4.conf.lo.tag = 0
net.ipv4.fwmark_reflect = 0
net.ipv4.icmp_echo_ignore_all = 0
net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.icmp_errors_use_inbound_ifaddr = 0
net.ipv4.icmp_ignore_bogus_error_responses = 1
net.ipv4.icmp_msgs_burst = 50
net.ipv4.icmp_msgs_per_sec = 1000
net.ipv4.icmp_ratelimit = 1000
net.ipv4.icmp_ratemask = 6168
net.ipv4.igmp_max_memberships = 20
net.ipv4.igmp_max_msf = 10
net.ipv4.igmp_qrv = 2
net.ipv4.inet_peer_maxttl = 600
net.ipv4.inet_peer_minttl = 120
net.ipv4.inet_peer_threshold = 65664
net.ipv4.ip_default_ttl = 64
net.ipv4.ip_dynaddr = 0
net.ipv4.ip_early_demux = 1
net.ipv4.ip_forward = 0
net.ipv4.ip_forward_use_pmtu = 0
net.ipv4.ip_local_port_range = 32768    60999
net.ipv4.ip_local_reserved_ports =
net.ipv4.ip_no_pmtu_disc = 0
net.ipv4.ip_nonlocal_bind = 0
net.ipv4.ipfrag_high_thresh = 4194304
net.ipv4.ipfrag_low_thresh = 3145728
net.ipv4.ipfrag_max_dist = 64
net.ipv4.ipfrag_secret_interval = 0
net.ipv4.ipfrag_time = 30
net.ipv4.neigh.default.anycast_delay = 100
net.ipv4.neigh.default.app_solicit = 0
net.ipv4.neigh.default.base_reachable_time_ms = 30000
net.ipv4.neigh.default.delay_first_probe_time = 5
net.ipv4.neigh.default.gc_interval = 30
net.ipv4.neigh.default.gc_stale_time = 60
net.ipv4.neigh.default.gc_thresh1 = 128
net.ipv4.neigh.default.gc_thresh2 = 512
net.ipv4.neigh.default.gc_thresh3 = 1024
net.ipv4.neigh.default.locktime = 100
net.ipv4.neigh.default.mcast_resolicit = 0
net.ipv4.neigh.default.mcast_solicit = 3
net.ipv4.neigh.default.proxy_delay = 80
net.ipv4.neigh.default.proxy_qlen = 64
net.ipv4.neigh.default.retrans_time_ms = 1000
net.ipv4.neigh.default.ucast_solicit = 3
net.ipv4.neigh.default.unres_qlen = 31
net.ipv4.neigh.default.unres_qlen_bytes = 65536
net.ipv4.neigh.enp0s3.anycast_delay = 100
net.ipv4.neigh.enp0s3.app_solicit = 0
net.ipv4.neigh.enp0s3.base_reachable_time_ms = 30000
net.ipv4.neigh.enp0s3.delay_first_probe_time = 5
net.ipv4.neigh.enp0s3.gc_stale_time = 60
net.ipv4.neigh.enp0s3.locktime = 100
net.ipv4.neigh.enp0s3.mcast_resolicit = 0
net.ipv4.neigh.enp0s3.mcast_solicit = 3
net.ipv4.neigh.enp0s3.proxy_delay = 80
net.ipv4.neigh.enp0s3.proxy_qlen = 64
net.ipv4.neigh.enp0s3.retrans_time_ms = 1000
net.ipv4.neigh.enp0s3.ucast_solicit = 3
net.ipv4.neigh.enp0s3.unres_qlen = 31
net.ipv4.neigh.enp0s3.unres_qlen_bytes = 65536
net.ipv4.neigh.lo.anycast_delay = 100
net.ipv4.neigh.lo.app_solicit = 0
net.ipv4.neigh.lo.base_reachable_time_ms = 30000
net.ipv4.neigh.lo.delay_first_probe_time = 5
net.ipv4.neigh.lo.gc_stale_time = 60
net.ipv4.neigh.lo.locktime = 100
net.ipv4.neigh.lo.mcast_resolicit = 0
net.ipv4.neigh.lo.mcast_solicit = 3
net.ipv4.neigh.lo.proxy_delay = 80
net.ipv4.neigh.lo.proxy_qlen = 64
net.ipv4.neigh.lo.retrans_time_ms = 1000
net.ipv4.neigh.lo.ucast_solicit = 3
net.ipv4.neigh.lo.unres_qlen = 31
net.ipv4.neigh.lo.unres_qlen_bytes = 65536
net.ipv4.ping_group_range = 1   0
net.ipv4.route.error_burst = 5000
net.ipv4.route.error_cost = 1000
net.ipv4.route.gc_elasticity = 8
net.ipv4.route.gc_interval = 60
net.ipv4.route.gc_min_interval = 0
net.ipv4.route.gc_min_interval_ms = 500
net.ipv4.route.gc_thresh = -1
net.ipv4.route.gc_timeout = 300
net.ipv4.route.max_size = 2147483647
net.ipv4.route.min_adv_mss = 256
net.ipv4.route.min_pmtu = 552
net.ipv4.route.mtu_expires = 600
net.ipv4.route.redirect_load = 20
net.ipv4.route.redirect_number = 9
net.ipv4.route.redirect_silence = 20480
net.ipv4.tcp_abort_on_overflow = 0
net.ipv4.tcp_adv_win_scale = 1
net.ipv4.tcp_allowed_congestion_control = cubic reno
net.ipv4.tcp_app_win = 31
net.ipv4.tcp_autocorking = 1
net.ipv4.tcp_available_congestion_control = cubic reno
net.ipv4.tcp_base_mss = 1024
net.ipv4.tcp_challenge_ack_limit = 100
net.ipv4.tcp_congestion_control = cubic
net.ipv4.tcp_dsack = 1
net.ipv4.tcp_early_retrans = 3
net.ipv4.tcp_ecn = 2
net.ipv4.tcp_ecn_fallback = 1
net.ipv4.tcp_fack = 1
net.ipv4.tcp_fastopen = 1
net.ipv4.tcp_fastopen_key = 00000000-00000000-00000000-00000000
net.ipv4.tcp_fin_timeout = 60
net.ipv4.tcp_frto = 2
net.ipv4.tcp_fwmark_accept = 0
net.ipv4.tcp_invalid_ratelimit = 500
net.ipv4.tcp_keepalive_intvl = 75
net.ipv4.tcp_keepalive_probes = 9
net.ipv4.tcp_keepalive_time = 7200
net.ipv4.tcp_limit_output_bytes = 262144
net.ipv4.tcp_low_latency = 0
net.ipv4.tcp_max_orphans = 4096
net.ipv4.tcp_max_reordering = 300
net.ipv4.tcp_max_syn_backlog = 128
net.ipv4.tcp_max_tw_buckets = 4096
net.ipv4.tcp_mem = 7998 10665   15996
net.ipv4.tcp_min_tso_segs = 2
net.ipv4.tcp_moderate_rcvbuf = 1
net.ipv4.tcp_mtu_probing = 0
net.ipv4.tcp_no_metrics_save = 0
net.ipv4.tcp_notsent_lowat = -1
net.ipv4.tcp_orphan_retries = 0
net.ipv4.tcp_probe_interval = 600
net.ipv4.tcp_probe_threshold = 8
net.ipv4.tcp_reordering = 3
net.ipv4.tcp_retrans_collapse = 1
net.ipv4.tcp_retries1 = 3
net.ipv4.tcp_retries2 = 15
net.ipv4.tcp_rfc1337 = 0
net.ipv4.tcp_rmem = 4096        87380   5460832
net.ipv4.tcp_sack = 1
net.ipv4.tcp_slow_start_after_idle = 1
net.ipv4.tcp_stdurg = 0
net.ipv4.tcp_syn_retries = 6
net.ipv4.tcp_synack_retries = 5
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_thin_dupack = 0
net.ipv4.tcp_thin_linear_timeouts = 0
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_tso_win_divisor = 3
net.ipv4.tcp_tw_recycle = 0
net.ipv4.tcp_tw_reuse = 0
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_wmem = 4096        16384   4194304
net.ipv4.tcp_workaround_signed_windows = 0
net.ipv4.udp_mem = 15996        21331   31992
net.ipv4.udp_rmem_min = 4096
net.ipv4.udp_wmem_min = 4096
net.ipv4.xfrm4_gc_thresh = 32768
net.ipv6.anycast_src_echo_reply = 0
net.ipv6.auto_flowlabels = 0
net.ipv6.bindv6only = 0
net.ipv6.conf.all.accept_dad = 1
net.ipv6.conf.all.accept_ra = 1
net.ipv6.conf.all.accept_ra_defrtr = 1
net.ipv6.conf.all.accept_ra_from_local = 0
net.ipv6.conf.all.accept_ra_mtu = 1
net.ipv6.conf.all.accept_ra_pinfo = 1
net.ipv6.conf.all.accept_ra_rt_info_max_plen = 0
net.ipv6.conf.all.accept_ra_rtr_pref = 1
net.ipv6.conf.all.accept_redirects = 1
net.ipv6.conf.all.accept_source_route = 0
net.ipv6.conf.all.autoconf = 1
net.ipv6.conf.all.dad_transmits = 1
net.ipv6.conf.all.disable_ipv6 = 0
net.ipv6.conf.all.force_mld_version = 0
net.ipv6.conf.all.force_tllao = 0
net.ipv6.conf.all.forwarding = 0
net.ipv6.conf.all.hop_limit = 64
net.ipv6.conf.all.max_addresses = 16
net.ipv6.conf.all.max_desync_factor = 600
net.ipv6.conf.all.mc_forwarding = 0
net.ipv6.conf.all.mldv1_unsolicited_report_interval = 10000
net.ipv6.conf.all.mldv2_unsolicited_report_interval = 1000
net.ipv6.conf.all.mtu = 1280
net.ipv6.conf.all.ndisc_notify = 0
net.ipv6.conf.all.optimistic_dad = 0
net.ipv6.conf.all.proxy_ndp = 0
net.ipv6.conf.all.regen_max_retry = 3
net.ipv6.conf.all.router_probe_interval = 60
net.ipv6.conf.all.router_solicitation_delay = 1
net.ipv6.conf.all.router_solicitation_interval = 4
net.ipv6.conf.all.router_solicitations = 3
sysctl: reading key "net.ipv6.conf.all.stable_secret"
net.ipv6.conf.all.suppress_frag_ndisc = 1
net.ipv6.conf.all.temp_prefered_lft = 86400
net.ipv6.conf.all.temp_valid_lft = 604800
net.ipv6.conf.all.use_optimistic = 0
net.ipv6.conf.all.use_tempaddr = 0
net.ipv6.conf.default.accept_dad = 1
net.ipv6.conf.default.accept_ra = 1
net.ipv6.conf.default.accept_ra_defrtr = 1
net.ipv6.conf.default.accept_ra_from_local = 0
net.ipv6.conf.default.accept_ra_mtu = 1
net.ipv6.conf.default.accept_ra_pinfo = 1
net.ipv6.conf.default.accept_ra_rt_info_max_plen = 0
net.ipv6.conf.default.accept_ra_rtr_pref = 1
net.ipv6.conf.default.accept_redirects = 1
net.ipv6.conf.default.accept_source_route = 0
net.ipv6.conf.default.autoconf = 1
net.ipv6.conf.default.dad_transmits = 1
net.ipv6.conf.default.disable_ipv6 = 0
net.ipv6.conf.default.force_mld_version = 0
net.ipv6.conf.default.force_tllao = 0
net.ipv6.conf.default.forwarding = 0
net.ipv6.conf.default.hop_limit = 64
net.ipv6.conf.default.max_addresses = 16
net.ipv6.conf.default.max_desync_factor = 600
net.ipv6.conf.default.mc_forwarding = 0
net.ipv6.conf.default.mldv1_unsolicited_report_interval = 10000
net.ipv6.conf.default.mldv2_unsolicited_report_interval = 1000
net.ipv6.conf.default.mtu = 1280
net.ipv6.conf.default.ndisc_notify = 0
net.ipv6.conf.default.optimistic_dad = 0
net.ipv6.conf.default.proxy_ndp = 0
net.ipv6.conf.default.regen_max_retry = 3
net.ipv6.conf.default.router_probe_interval = 60
net.ipv6.conf.default.router_solicitation_delay = 1
net.ipv6.conf.default.router_solicitation_interval = 4
net.ipv6.conf.default.router_solicitations = 3
sysctl: reading key "net.ipv6.conf.default.stable_secret"
net.ipv6.conf.default.suppress_frag_ndisc = 1
net.ipv6.conf.default.temp_prefered_lft = 86400
net.ipv6.conf.default.temp_valid_lft = 604800
net.ipv6.conf.default.use_optimistic = 0
net.ipv6.conf.default.use_tempaddr = 0
net.ipv6.conf.enp0s3.accept_dad = 1
net.ipv6.conf.enp0s3.accept_ra = 1
net.ipv6.conf.enp0s3.accept_ra_defrtr = 0
net.ipv6.conf.enp0s3.accept_ra_from_local = 0
net.ipv6.conf.enp0s3.accept_ra_mtu = 1
net.ipv6.conf.enp0s3.accept_ra_pinfo = 0
net.ipv6.conf.enp0s3.accept_ra_rt_info_max_plen = 0
net.ipv6.conf.enp0s3.accept_ra_rtr_pref = 0
net.ipv6.conf.enp0s3.accept_redirects = 1
net.ipv6.conf.enp0s3.accept_source_route = 0
net.ipv6.conf.enp0s3.autoconf = 1
net.ipv6.conf.enp0s3.dad_transmits = 1
net.ipv6.conf.enp0s3.disable_ipv6 = 0
net.ipv6.conf.enp0s3.force_mld_version = 0
net.ipv6.conf.enp0s3.force_tllao = 0
net.ipv6.conf.enp0s3.forwarding = 0
net.ipv6.conf.enp0s3.hop_limit = 64
net.ipv6.conf.enp0s3.max_addresses = 16
net.ipv6.conf.enp0s3.max_desync_factor = 600
net.ipv6.conf.enp0s3.mc_forwarding = 0
net.ipv6.conf.enp0s3.mldv1_unsolicited_report_interval = 10000
net.ipv6.conf.enp0s3.mldv2_unsolicited_report_interval = 1000
net.ipv6.conf.enp0s3.mtu = 1500
net.ipv6.conf.enp0s3.ndisc_notify = 0
net.ipv6.conf.enp0s3.optimistic_dad = 0
net.ipv6.conf.enp0s3.proxy_ndp = 0
net.ipv6.conf.enp0s3.regen_max_retry = 3
net.ipv6.conf.enp0s3.router_probe_interval = 60
net.ipv6.conf.enp0s3.router_solicitation_delay = 1
net.ipv6.conf.enp0s3.router_solicitation_interval = 4
net.ipv6.conf.enp0s3.router_solicitations = 3
sysctl: reading key "net.ipv6.conf.enp0s3.stable_secret"
net.ipv6.conf.enp0s3.suppress_frag_ndisc = 1
net.ipv6.conf.enp0s3.temp_prefered_lft = 86400
net.ipv6.conf.enp0s3.temp_valid_lft = 604800
net.ipv6.conf.enp0s3.use_optimistic = 0
net.ipv6.conf.enp0s3.use_tempaddr = 0
net.ipv6.conf.lo.accept_dad = -1
net.ipv6.conf.lo.accept_ra = 1
net.ipv6.conf.lo.accept_ra_defrtr = 1
net.ipv6.conf.lo.accept_ra_from_local = 0
net.ipv6.conf.lo.accept_ra_mtu = 1
net.ipv6.conf.lo.accept_ra_pinfo = 1
net.ipv6.conf.lo.accept_ra_rt_info_max_plen = 0
net.ipv6.conf.lo.accept_ra_rtr_pref = 1
net.ipv6.conf.lo.accept_redirects = 1
net.ipv6.conf.lo.accept_source_route = 0
net.ipv6.conf.lo.autoconf = 1
net.ipv6.conf.lo.dad_transmits = 1
net.ipv6.conf.lo.disable_ipv6 = 0
net.ipv6.conf.lo.force_mld_version = 0
net.ipv6.conf.lo.force_tllao = 0
net.ipv6.conf.lo.forwarding = 0
net.ipv6.conf.lo.hop_limit = 64
net.ipv6.conf.lo.max_addresses = 16
net.ipv6.conf.lo.max_desync_factor = 600
net.ipv6.conf.lo.mc_forwarding = 0
net.ipv6.conf.lo.mldv1_unsolicited_report_interval = 10000
net.ipv6.conf.lo.mldv2_unsolicited_report_interval = 1000
net.ipv6.conf.lo.mtu = 65536
net.ipv6.conf.lo.ndisc_notify = 0
net.ipv6.conf.lo.optimistic_dad = 0
net.ipv6.conf.lo.proxy_ndp = 0
net.ipv6.conf.lo.regen_max_retry = 3
net.ipv6.conf.lo.router_probe_interval = 60
net.ipv6.conf.lo.router_solicitation_delay = 1
net.ipv6.conf.lo.router_solicitation_interval = 4
net.ipv6.conf.lo.router_solicitations = 3
sysctl: reading key "net.ipv6.conf.lo.stable_secret"
net.ipv6.conf.lo.suppress_frag_ndisc = 1
net.ipv6.conf.lo.temp_prefered_lft = 86400
net.ipv6.conf.lo.temp_valid_lft = 604800
net.ipv6.conf.lo.use_optimistic = 0
net.ipv6.conf.lo.use_tempaddr = -1
net.ipv6.flowlabel_consistency = 1
net.ipv6.flowlabel_state_ranges = 1
net.ipv6.fwmark_reflect = 0
net.ipv6.icmp.ratelimit = 1000
net.ipv6.idgen_delay = 1
net.ipv6.idgen_retries = 3
net.ipv6.ip6frag_high_thresh = 4194304
net.ipv6.ip6frag_low_thresh = 3145728
net.ipv6.ip6frag_secret_interval = 0
net.ipv6.ip6frag_time = 60
net.ipv6.mld_max_msf = 64
net.ipv6.mld_qrv = 2
net.ipv6.neigh.default.anycast_delay = 100
net.ipv6.neigh.default.app_solicit = 0
net.ipv6.neigh.default.base_reachable_time_ms = 30000
net.ipv6.neigh.default.delay_first_probe_time = 5
net.ipv6.neigh.default.gc_interval = 30
net.ipv6.neigh.default.gc_stale_time = 60
net.ipv6.neigh.default.gc_thresh1 = 128
net.ipv6.neigh.default.gc_thresh2 = 512
net.ipv6.neigh.default.gc_thresh3 = 1024
net.ipv6.neigh.default.locktime = 0
net.ipv6.neigh.default.mcast_resolicit = 0
net.ipv6.neigh.default.mcast_solicit = 3
net.ipv6.neigh.default.proxy_delay = 80
net.ipv6.neigh.default.proxy_qlen = 64
net.ipv6.neigh.default.retrans_time_ms = 1000
net.ipv6.neigh.default.ucast_solicit = 3
net.ipv6.neigh.default.unres_qlen = 31
net.ipv6.neigh.default.unres_qlen_bytes = 65536
net.ipv6.neigh.enp0s3.anycast_delay = 100
net.ipv6.neigh.enp0s3.app_solicit = 0
net.ipv6.neigh.enp0s3.base_reachable_time_ms = 30000
net.ipv6.neigh.enp0s3.delay_first_probe_time = 5
net.ipv6.neigh.enp0s3.gc_stale_time = 60
net.ipv6.neigh.enp0s3.locktime = 0
net.ipv6.neigh.enp0s3.mcast_resolicit = 0
net.ipv6.neigh.enp0s3.mcast_solicit = 3
net.ipv6.neigh.enp0s3.proxy_delay = 80
net.ipv6.neigh.enp0s3.proxy_qlen = 64
net.ipv6.neigh.enp0s3.retrans_time_ms = 1000
net.ipv6.neigh.enp0s3.ucast_solicit = 3
net.ipv6.neigh.enp0s3.unres_qlen = 31
net.ipv6.neigh.enp0s3.unres_qlen_bytes = 65536
net.ipv6.neigh.lo.anycast_delay = 100
net.ipv6.neigh.lo.app_solicit = 0
net.ipv6.neigh.lo.base_reachable_time_ms = 30000
net.ipv6.neigh.lo.delay_first_probe_time = 5
net.ipv6.neigh.lo.gc_stale_time = 60
net.ipv6.neigh.lo.locktime = 0
net.ipv6.neigh.lo.mcast_resolicit = 0
net.ipv6.neigh.lo.mcast_solicit = 3
net.ipv6.neigh.lo.proxy_delay = 80
net.ipv6.neigh.lo.proxy_qlen = 64
net.ipv6.neigh.lo.retrans_time_ms = 1000
net.ipv6.neigh.lo.ucast_solicit = 3
net.ipv6.neigh.lo.unres_qlen = 31
net.ipv6.neigh.lo.unres_qlen_bytes = 65536
net.ipv6.route.gc_elasticity = 9
net.ipv6.route.gc_interval = 30
net.ipv6.route.gc_min_interval = 0
net.ipv6.route.gc_min_interval_ms = 500
net.ipv6.route.gc_thresh = 1024
net.ipv6.route.gc_timeout = 60
net.ipv6.route.max_size = 4096
net.ipv6.route.min_adv_mss = 1220
net.ipv6.route.mtu_expires = 600
net.ipv6.xfrm6_gc_thresh = 32768
net.netfilter.nf_conntrack_acct = 0
net.netfilter.nf_conntrack_buckets = 6144
net.netfilter.nf_conntrack_checksum = 1
net.netfilter.nf_conntrack_count = 5
net.netfilter.nf_conntrack_events = 1
net.netfilter.nf_conntrack_expect_max = 92
net.netfilter.nf_conntrack_frag6_high_thresh = 4194304
net.netfilter.nf_conntrack_frag6_low_thresh = 3145728
net.netfilter.nf_conntrack_frag6_timeout = 60
net.netfilter.nf_conntrack_generic_timeout = 600
net.netfilter.nf_conntrack_helper = 1
net.netfilter.nf_conntrack_icmp_timeout = 30
net.netfilter.nf_conntrack_icmpv6_timeout = 30
net.netfilter.nf_conntrack_log_invalid = 0
net.netfilter.nf_conntrack_max = 23724
net.netfilter.nf_conntrack_tcp_be_liberal = 0
net.netfilter.nf_conntrack_tcp_loose = 1
net.netfilter.nf_conntrack_tcp_max_retrans = 3
net.netfilter.nf_conntrack_tcp_timeout_close = 10
net.netfilter.nf_conntrack_tcp_timeout_close_wait = 60
net.netfilter.nf_conntrack_tcp_timeout_established = 432000
net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 120
net.netfilter.nf_conntrack_tcp_timeout_last_ack = 30
net.netfilter.nf_conntrack_tcp_timeout_max_retrans = 300
net.netfilter.nf_conntrack_tcp_timeout_syn_recv = 60
net.netfilter.nf_conntrack_tcp_timeout_syn_sent = 120
net.netfilter.nf_conntrack_tcp_timeout_time_wait = 120
net.netfilter.nf_conntrack_tcp_timeout_unacknowledged = 300
net.netfilter.nf_conntrack_timestamp = 0
net.netfilter.nf_conntrack_udp_timeout = 30
net.netfilter.nf_conntrack_udp_timeout_stream = 180
net.netfilter.nf_log.0 = NONE
net.netfilter.nf_log.1 = NONE
net.netfilter.nf_log.10 = NONE
net.netfilter.nf_log.11 = NONE
net.netfilter.nf_log.12 = NONE
net.netfilter.nf_log.2 = NONE
net.netfilter.nf_log.3 = NONE
net.netfilter.nf_log.4 = NONE
net.netfilter.nf_log.5 = NONE
net.netfilter.nf_log.6 = NONE
net.netfilter.nf_log.7 = NONE
net.netfilter.nf_log.8 = NONE
net.netfilter.nf_log.9 = NONE
net.nf_conntrack_max = 23724
net.unix.max_dgram_qlen = 10
sunrpc.max_resvport = 1023
sunrpc.min_resvport = 665
sunrpc.nfs_debug = 0
sunrpc.nfsd_debug = 0
sunrpc.nlm_debug = 0
sunrpc.rpc_debug = 0
sunrpc.tcp_fin_timeout = 15
sunrpc.tcp_max_slot_table_entries = 65536
sunrpc.tcp_slot_table_entries = 2
sunrpc.transports = tcp 1048576
sunrpc.transports = udp 32768
sunrpc.transports = tcp-bc 1048576
sunrpc.udp_slot_table_entries = 16
vm.admin_reserve_kbytes = 8192
vm.block_dump = 0
vm.compact_unevictable_allowed = 1
vm.dirty_background_bytes = 0
vm.dirty_background_ratio = 10
vm.dirty_bytes = 0
vm.dirty_expire_centisecs = 3000
vm.dirty_ratio = 20
vm.dirty_writeback_centisecs = 500
vm.dirtytime_expire_seconds = 43200
vm.drop_caches = 0
vm.extfrag_threshold = 500
vm.hugepages_treat_as_movable = 0
vm.hugetlb_shm_group = 0
vm.laptop_mode = 0
vm.legacy_va_layout = 0
vm.lowmem_reserve_ratio = 256   256     32
vm.max_map_count = 65530
vm.memory_failure_early_kill = 0
vm.memory_failure_recovery = 1
vm.min_free_kbytes = 3349
vm.min_slab_ratio = 5
vm.min_unmapped_ratio = 1
vm.mmap_min_addr = 65536
vm.nr_hugepages = 0
vm.nr_hugepages_mempolicy = 0
vm.nr_overcommit_hugepages = 0
vm.nr_pdflush_threads = 0
vm.numa_zonelist_order = default
vm.oom_dump_tasks = 1
vm.oom_kill_allocating_task = 0
vm.overcommit_kbytes = 0
vm.overcommit_memory = 0
vm.overcommit_ratio = 50
vm.page-cluster = 3
vm.panic_on_oom = 0
vm.percpu_pagelist_fraction = 0
vm.stat_interval = 1
vm.swappiness = 60
vm.user_reserve_kbytes = 22931
vm.vfs_cache_pressure = 100
vm.zone_reclaim_mode = 0

# find /proc/sys -type f
/proc/sys/abi/vsyscall32
/proc/sys/crypto/fips_enabled
/proc/sys/debug/exception-trace
/proc/sys/debug/kprobes-optimization
/proc/sys/dev/cdrom/autoclose
/proc/sys/dev/cdrom/autoeject
/proc/sys/dev/cdrom/check_media
/proc/sys/dev/cdrom/debug
/proc/sys/dev/cdrom/info
/proc/sys/dev/cdrom/lock
/proc/sys/dev/hpet/max-user-freq
/proc/sys/dev/mac_hid/mouse_button2_keycode
/proc/sys/dev/mac_hid/mouse_button3_keycode
/proc/sys/dev/mac_hid/mouse_button_emulation
/proc/sys/dev/parport/default/spintime
/proc/sys/dev/parport/default/timeslice
/proc/sys/dev/raid/speed_limit_max
/proc/sys/dev/raid/speed_limit_min
/proc/sys/dev/scsi/logging_level
/proc/sys/fs/aio-max-nr
/proc/sys/fs/aio-nr
/proc/sys/fs/binfmt_misc/register
/proc/sys/fs/binfmt_misc/status
/proc/sys/fs/dentry-state
/proc/sys/fs/dir-notify-enable
/proc/sys/fs/epoll/max_user_watches
/proc/sys/fs/file-max
/proc/sys/fs/file-nr
/proc/sys/fs/inode-nr
/proc/sys/fs/inode-state
/proc/sys/fs/inotify/max_queued_events
/proc/sys/fs/inotify/max_user_instances
/proc/sys/fs/inotify/max_user_watches
/proc/sys/fs/lease-break-time
/proc/sys/fs/leases-enable
/proc/sys/fs/mqueue/msg_default
/proc/sys/fs/mqueue/msg_max
/proc/sys/fs/mqueue/msgsize_default
/proc/sys/fs/mqueue/msgsize_max
/proc/sys/fs/mqueue/queues_max
/proc/sys/fs/nfs/nlm_grace_period
/proc/sys/fs/nfs/nlm_tcpport
/proc/sys/fs/nfs/nlm_timeout
/proc/sys/fs/nfs/nlm_udpport
/proc/sys/fs/nfs/nsm_local_state
/proc/sys/fs/nfs/nsm_use_hostnames
/proc/sys/fs/nr_open
/proc/sys/fs/overflowgid
/proc/sys/fs/overflowuid
/proc/sys/fs/pipe-max-size
/proc/sys/fs/protected_hardlinks
/proc/sys/fs/protected_symlinks
/proc/sys/fs/quota/allocated_dquots
/proc/sys/fs/quota/cache_hits
/proc/sys/fs/quota/drops
/proc/sys/fs/quota/free_dquots
/proc/sys/fs/quota/lookups
/proc/sys/fs/quota/reads
/proc/sys/fs/quota/syncs
/proc/sys/fs/quota/writes
/proc/sys/fs/suid_dumpable
/proc/sys/fs/xfs/error_level
/proc/sys/fs/xfs/filestream_centisecs
/proc/sys/fs/xfs/inherit_noatime
/proc/sys/fs/xfs/inherit_nodefrag
/proc/sys/fs/xfs/inherit_nodump
/proc/sys/fs/xfs/inherit_nosymlinks
/proc/sys/fs/xfs/inherit_sync
/proc/sys/fs/xfs/irix_sgid_inherit
/proc/sys/fs/xfs/irix_symlink_mode
/proc/sys/fs/xfs/panic_mask
/proc/sys/fs/xfs/rotorstep
/proc/sys/fs/xfs/speculative_prealloc_lifetime
/proc/sys/fs/xfs/stats_clear
/proc/sys/fs/xfs/xfssyncd_centisecs
/proc/sys/kernel/acct
/proc/sys/kernel/acpi_video_flags
/proc/sys/kernel/auto_msgmni
/proc/sys/kernel/bootloader_type
/proc/sys/kernel/bootloader_version
/proc/sys/kernel/cad_pid
/proc/sys/kernel/cap_last_cap
/proc/sys/kernel/compat-log
/proc/sys/kernel/core_pattern
/proc/sys/kernel/core_pipe_limit
/proc/sys/kernel/core_uses_pid
/proc/sys/kernel/ctrl-alt-del
/proc/sys/kernel/dmesg_restrict
/proc/sys/kernel/domainname
/proc/sys/kernel/ftrace_dump_on_oops
/proc/sys/kernel/ftrace_enabled
/proc/sys/kernel/hostname
/proc/sys/kernel/io_delay_type
/proc/sys/kernel/kexec_load_disabled
/proc/sys/kernel/keys/gc_delay
/proc/sys/kernel/keys/maxbytes
/proc/sys/kernel/keys/maxkeys
/proc/sys/kernel/keys/persistent_keyring_expiry
/proc/sys/kernel/keys/root_maxbytes
/proc/sys/kernel/keys/root_maxkeys
/proc/sys/kernel/kptr_restrict
/proc/sys/kernel/kstack_depth_to_print
/proc/sys/kernel/latencytop
/proc/sys/kernel/max_lock_depth
/proc/sys/kernel/modprobe
/proc/sys/kernel/modules_disabled
/proc/sys/kernel/msg_next_id
/proc/sys/kernel/msgmax
/proc/sys/kernel/msgmnb
/proc/sys/kernel/msgmni
/proc/sys/kernel/ngroups_max
/proc/sys/kernel/nmi_watchdog
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/proc/sys/net/ipv4/udp_mem
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/proc/sys/net/ipv4/xfrm4_gc_thresh
/proc/sys/net/ipv6/anycast_src_echo_reply
/proc/sys/net/ipv6/auto_flowlabels
/proc/sys/net/ipv6/bindv6only
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/proc/sys/net/ipv6/conf/all/hop_limit
/proc/sys/net/ipv6/conf/all/max_addresses
/proc/sys/net/ipv6/conf/all/max_desync_factor
/proc/sys/net/ipv6/conf/all/mc_forwarding
/proc/sys/net/ipv6/conf/all/mldv1_unsolicited_report_interval
/proc/sys/net/ipv6/conf/all/mldv2_unsolicited_report_interval
/proc/sys/net/ipv6/conf/all/mtu
/proc/sys/net/ipv6/conf/all/ndisc_notify
/proc/sys/net/ipv6/conf/all/optimistic_dad
/proc/sys/net/ipv6/conf/all/proxy_ndp
/proc/sys/net/ipv6/conf/all/regen_max_retry
/proc/sys/net/ipv6/conf/all/router_probe_interval
/proc/sys/net/ipv6/conf/all/router_solicitation_delay
/proc/sys/net/ipv6/conf/all/router_solicitation_interval
/proc/sys/net/ipv6/conf/all/router_solicitations
/proc/sys/net/ipv6/conf/all/stable_secret
/proc/sys/net/ipv6/conf/all/suppress_frag_ndisc
/proc/sys/net/ipv6/conf/all/temp_prefered_lft
/proc/sys/net/ipv6/conf/all/temp_valid_lft
/proc/sys/net/ipv6/conf/all/use_optimistic
/proc/sys/net/ipv6/conf/all/use_tempaddr
/proc/sys/net/ipv6/conf/default/accept_dad
/proc/sys/net/ipv6/conf/default/accept_ra
/proc/sys/net/ipv6/conf/default/accept_ra_defrtr
/proc/sys/net/ipv6/conf/default/accept_ra_from_local
/proc/sys/net/ipv6/conf/default/accept_ra_mtu
/proc/sys/net/ipv6/conf/default/accept_ra_pinfo
/proc/sys/net/ipv6/conf/default/accept_ra_rt_info_max_plen
/proc/sys/net/ipv6/conf/default/accept_ra_rtr_pref
/proc/sys/net/ipv6/conf/default/accept_redirects
/proc/sys/net/ipv6/conf/default/accept_source_route
/proc/sys/net/ipv6/conf/default/autoconf
/proc/sys/net/ipv6/conf/default/dad_transmits
/proc/sys/net/ipv6/conf/default/disable_ipv6
/proc/sys/net/ipv6/conf/default/force_mld_version
/proc/sys/net/ipv6/conf/default/force_tllao
/proc/sys/net/ipv6/conf/default/forwarding
/proc/sys/net/ipv6/conf/default/hop_limit
/proc/sys/net/ipv6/conf/default/max_addresses
/proc/sys/net/ipv6/conf/default/max_desync_factor
/proc/sys/net/ipv6/conf/default/mc_forwarding
/proc/sys/net/ipv6/conf/default/mldv1_unsolicited_report_interval
/proc/sys/net/ipv6/conf/default/mldv2_unsolicited_report_interval
/proc/sys/net/ipv6/conf/default/mtu
/proc/sys/net/ipv6/conf/default/ndisc_notify
/proc/sys/net/ipv6/conf/default/optimistic_dad
/proc/sys/net/ipv6/conf/default/proxy_ndp
/proc/sys/net/ipv6/conf/default/regen_max_retry
/proc/sys/net/ipv6/conf/default/router_probe_interval
/proc/sys/net/ipv6/conf/default/router_solicitation_delay
/proc/sys/net/ipv6/conf/default/router_solicitation_interval
/proc/sys/net/ipv6/conf/default/router_solicitations
/proc/sys/net/ipv6/conf/default/stable_secret
/proc/sys/net/ipv6/conf/default/suppress_frag_ndisc
/proc/sys/net/ipv6/conf/default/temp_prefered_lft
/proc/sys/net/ipv6/conf/default/temp_valid_lft
/proc/sys/net/ipv6/conf/default/use_optimistic
/proc/sys/net/ipv6/conf/default/use_tempaddr
/proc/sys/net/ipv6/conf/enp0s3/accept_dad
/proc/sys/net/ipv6/conf/enp0s3/accept_ra
/proc/sys/net/ipv6/conf/enp0s3/accept_ra_defrtr
/proc/sys/net/ipv6/conf/enp0s3/accept_ra_from_local
/proc/sys/net/ipv6/conf/enp0s3/accept_ra_mtu
/proc/sys/net/ipv6/conf/enp0s3/accept_ra_pinfo
/proc/sys/net/ipv6/conf/enp0s3/accept_ra_rt_info_max_plen
/proc/sys/net/ipv6/conf/enp0s3/accept_ra_rtr_pref
/proc/sys/net/ipv6/conf/enp0s3/accept_redirects
/proc/sys/net/ipv6/conf/enp0s3/accept_source_route
/proc/sys/net/ipv6/conf/enp0s3/autoconf
/proc/sys/net/ipv6/conf/enp0s3/dad_transmits
/proc/sys/net/ipv6/conf/enp0s3/disable_ipv6
/proc/sys/net/ipv6/conf/enp0s3/force_mld_version
/proc/sys/net/ipv6/conf/enp0s3/force_tllao
/proc/sys/net/ipv6/conf/enp0s3/forwarding
/proc/sys/net/ipv6/conf/enp0s3/hop_limit
/proc/sys/net/ipv6/conf/enp0s3/max_addresses
/proc/sys/net/ipv6/conf/enp0s3/max_desync_factor
/proc/sys/net/ipv6/conf/enp0s3/mc_forwarding
/proc/sys/net/ipv6/conf/enp0s3/mldv1_unsolicited_report_interval
/proc/sys/net/ipv6/conf/enp0s3/mldv2_unsolicited_report_interval
/proc/sys/net/ipv6/conf/enp0s3/mtu
/proc/sys/net/ipv6/conf/enp0s3/ndisc_notify
/proc/sys/net/ipv6/conf/enp0s3/optimistic_dad
/proc/sys/net/ipv6/conf/enp0s3/proxy_ndp
/proc/sys/net/ipv6/conf/enp0s3/regen_max_retry
/proc/sys/net/ipv6/conf/enp0s3/router_probe_interval
/proc/sys/net/ipv6/conf/enp0s3/router_solicitation_delay
/proc/sys/net/ipv6/conf/enp0s3/router_solicitation_interval
/proc/sys/net/ipv6/conf/enp0s3/router_solicitations
/proc/sys/net/ipv6/conf/enp0s3/stable_secret
/proc/sys/net/ipv6/conf/enp0s3/suppress_frag_ndisc
/proc/sys/net/ipv6/conf/enp0s3/temp_prefered_lft
/proc/sys/net/ipv6/conf/enp0s3/temp_valid_lft
/proc/sys/net/ipv6/conf/enp0s3/use_optimistic
/proc/sys/net/ipv6/conf/enp0s3/use_tempaddr
/proc/sys/net/ipv6/conf/lo/accept_dad
/proc/sys/net/ipv6/conf/lo/accept_ra
/proc/sys/net/ipv6/conf/lo/accept_ra_defrtr
/proc/sys/net/ipv6/conf/lo/accept_ra_from_local
/proc/sys/net/ipv6/conf/lo/accept_ra_mtu
/proc/sys/net/ipv6/conf/lo/accept_ra_pinfo
/proc/sys/net/ipv6/conf/lo/accept_ra_rt_info_max_plen
/proc/sys/net/ipv6/conf/lo/accept_ra_rtr_pref
/proc/sys/net/ipv6/conf/lo/accept_redirects
/proc/sys/net/ipv6/conf/lo/accept_source_route
/proc/sys/net/ipv6/conf/lo/autoconf
/proc/sys/net/ipv6/conf/lo/dad_transmits
/proc/sys/net/ipv6/conf/lo/disable_ipv6
/proc/sys/net/ipv6/conf/lo/force_mld_version
/proc/sys/net/ipv6/conf/lo/force_tllao
/proc/sys/net/ipv6/conf/lo/forwarding
/proc/sys/net/ipv6/conf/lo/hop_limit
/proc/sys/net/ipv6/conf/lo/max_addresses
/proc/sys/net/ipv6/conf/lo/max_desync_factor
/proc/sys/net/ipv6/conf/lo/mc_forwarding
/proc/sys/net/ipv6/conf/lo/mldv1_unsolicited_report_interval
/proc/sys/net/ipv6/conf/lo/mldv2_unsolicited_report_interval
/proc/sys/net/ipv6/conf/lo/mtu
/proc/sys/net/ipv6/conf/lo/ndisc_notify
/proc/sys/net/ipv6/conf/lo/optimistic_dad
/proc/sys/net/ipv6/conf/lo/proxy_ndp
/proc/sys/net/ipv6/conf/lo/regen_max_retry
/proc/sys/net/ipv6/conf/lo/router_probe_interval
/proc/sys/net/ipv6/conf/lo/router_solicitation_delay
/proc/sys/net/ipv6/conf/lo/router_solicitation_interval
/proc/sys/net/ipv6/conf/lo/router_solicitations
/proc/sys/net/ipv6/conf/lo/stable_secret
/proc/sys/net/ipv6/conf/lo/suppress_frag_ndisc
/proc/sys/net/ipv6/conf/lo/temp_prefered_lft
/proc/sys/net/ipv6/conf/lo/temp_valid_lft
/proc/sys/net/ipv6/conf/lo/use_optimistic
/proc/sys/net/ipv6/conf/lo/use_tempaddr
/proc/sys/net/ipv6/flowlabel_consistency
/proc/sys/net/ipv6/flowlabel_state_ranges
/proc/sys/net/ipv6/fwmark_reflect
/proc/sys/net/ipv6/icmp/ratelimit
/proc/sys/net/ipv6/idgen_delay
/proc/sys/net/ipv6/idgen_retries
/proc/sys/net/ipv6/ip6frag_high_thresh
/proc/sys/net/ipv6/ip6frag_low_thresh
/proc/sys/net/ipv6/ip6frag_secret_interval
/proc/sys/net/ipv6/ip6frag_time
/proc/sys/net/ipv6/mld_max_msf
/proc/sys/net/ipv6/mld_qrv
/proc/sys/net/ipv6/neigh/default/anycast_delay
/proc/sys/net/ipv6/neigh/default/app_solicit
/proc/sys/net/ipv6/neigh/default/base_reachable_time
/proc/sys/net/ipv6/neigh/default/base_reachable_time_ms
/proc/sys/net/ipv6/neigh/default/delay_first_probe_time
/proc/sys/net/ipv6/neigh/default/gc_interval
/proc/sys/net/ipv6/neigh/default/gc_stale_time
/proc/sys/net/ipv6/neigh/default/gc_thresh1
/proc/sys/net/ipv6/neigh/default/gc_thresh2
/proc/sys/net/ipv6/neigh/default/gc_thresh3
/proc/sys/net/ipv6/neigh/default/locktime
/proc/sys/net/ipv6/neigh/default/mcast_resolicit
/proc/sys/net/ipv6/neigh/default/mcast_solicit
/proc/sys/net/ipv6/neigh/default/proxy_delay
/proc/sys/net/ipv6/neigh/default/proxy_qlen
/proc/sys/net/ipv6/neigh/default/retrans_time
/proc/sys/net/ipv6/neigh/default/retrans_time_ms
/proc/sys/net/ipv6/neigh/default/ucast_solicit
/proc/sys/net/ipv6/neigh/default/unres_qlen
/proc/sys/net/ipv6/neigh/default/unres_qlen_bytes
/proc/sys/net/ipv6/neigh/enp0s3/anycast_delay
/proc/sys/net/ipv6/neigh/enp0s3/app_solicit
/proc/sys/net/ipv6/neigh/enp0s3/base_reachable_time
/proc/sys/net/ipv6/neigh/enp0s3/base_reachable_time_ms
/proc/sys/net/ipv6/neigh/enp0s3/delay_first_probe_time
/proc/sys/net/ipv6/neigh/enp0s3/gc_stale_time
/proc/sys/net/ipv6/neigh/enp0s3/locktime
/proc/sys/net/ipv6/neigh/enp0s3/mcast_resolicit
/proc/sys/net/ipv6/neigh/enp0s3/mcast_solicit
/proc/sys/net/ipv6/neigh/enp0s3/proxy_delay
/proc/sys/net/ipv6/neigh/enp0s3/proxy_qlen
/proc/sys/net/ipv6/neigh/enp0s3/retrans_time
/proc/sys/net/ipv6/neigh/enp0s3/retrans_time_ms
/proc/sys/net/ipv6/neigh/enp0s3/ucast_solicit
/proc/sys/net/ipv6/neigh/enp0s3/unres_qlen
/proc/sys/net/ipv6/neigh/enp0s3/unres_qlen_bytes
/proc/sys/net/ipv6/neigh/lo/anycast_delay
/proc/sys/net/ipv6/neigh/lo/app_solicit
/proc/sys/net/ipv6/neigh/lo/base_reachable_time
/proc/sys/net/ipv6/neigh/lo/base_reachable_time_ms
/proc/sys/net/ipv6/neigh/lo/delay_first_probe_time
/proc/sys/net/ipv6/neigh/lo/gc_stale_time
/proc/sys/net/ipv6/neigh/lo/locktime
/proc/sys/net/ipv6/neigh/lo/mcast_resolicit
/proc/sys/net/ipv6/neigh/lo/mcast_solicit
/proc/sys/net/ipv6/neigh/lo/proxy_delay
/proc/sys/net/ipv6/neigh/lo/proxy_qlen
/proc/sys/net/ipv6/neigh/lo/retrans_time
/proc/sys/net/ipv6/neigh/lo/retrans_time_ms
/proc/sys/net/ipv6/neigh/lo/ucast_solicit
/proc/sys/net/ipv6/neigh/lo/unres_qlen
/proc/sys/net/ipv6/neigh/lo/unres_qlen_bytes
/proc/sys/net/ipv6/route/flush
/proc/sys/net/ipv6/route/gc_elasticity
/proc/sys/net/ipv6/route/gc_interval
/proc/sys/net/ipv6/route/gc_min_interval
/proc/sys/net/ipv6/route/gc_min_interval_ms
/proc/sys/net/ipv6/route/gc_thresh
/proc/sys/net/ipv6/route/gc_timeout
/proc/sys/net/ipv6/route/max_size
/proc/sys/net/ipv6/route/min_adv_mss
/proc/sys/net/ipv6/route/mtu_expires
/proc/sys/net/ipv6/xfrm6_gc_thresh
/proc/sys/net/netfilter/nf_conntrack_acct
/proc/sys/net/netfilter/nf_conntrack_buckets
/proc/sys/net/netfilter/nf_conntrack_checksum
/proc/sys/net/netfilter/nf_conntrack_count
/proc/sys/net/netfilter/nf_conntrack_events
/proc/sys/net/netfilter/nf_conntrack_expect_max
/proc/sys/net/netfilter/nf_conntrack_frag6_high_thresh
/proc/sys/net/netfilter/nf_conntrack_frag6_low_thresh
/proc/sys/net/netfilter/nf_conntrack_frag6_timeout
/proc/sys/net/netfilter/nf_conntrack_generic_timeout
/proc/sys/net/netfilter/nf_conntrack_helper
/proc/sys/net/netfilter/nf_conntrack_icmp_timeout
/proc/sys/net/netfilter/nf_conntrack_icmpv6_timeout
/proc/sys/net/netfilter/nf_conntrack_log_invalid
/proc/sys/net/netfilter/nf_conntrack_max
/proc/sys/net/netfilter/nf_conntrack_tcp_be_liberal
/proc/sys/net/netfilter/nf_conntrack_tcp_loose
/proc/sys/net/netfilter/nf_conntrack_tcp_max_retrans
/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_close
/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_close_wait
/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established
/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_fin_wait
/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_last_ack
/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_max_retrans
/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_syn_recv
/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_syn_sent
/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_time_wait
/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_unacknowledged
/proc/sys/net/netfilter/nf_conntrack_timestamp
/proc/sys/net/netfilter/nf_conntrack_udp_timeout
/proc/sys/net/netfilter/nf_conntrack_udp_timeout_stream
/proc/sys/net/netfilter/nf_log/0
/proc/sys/net/netfilter/nf_log/1
/proc/sys/net/netfilter/nf_log/10
/proc/sys/net/netfilter/nf_log/11
/proc/sys/net/netfilter/nf_log/12
/proc/sys/net/netfilter/nf_log/2
/proc/sys/net/netfilter/nf_log/3
/proc/sys/net/netfilter/nf_log/4
/proc/sys/net/netfilter/nf_log/5
/proc/sys/net/netfilter/nf_log/6
/proc/sys/net/netfilter/nf_log/7
/proc/sys/net/netfilter/nf_log/8
/proc/sys/net/netfilter/nf_log/9
/proc/sys/net/nf_conntrack_max
/proc/sys/net/unix/max_dgram_qlen
/proc/sys/sunrpc/max_resvport
/proc/sys/sunrpc/min_resvport
/proc/sys/sunrpc/nfs_debug
/proc/sys/sunrpc/nfsd_debug
/proc/sys/sunrpc/nlm_debug
/proc/sys/sunrpc/rpc_debug
/proc/sys/sunrpc/tcp_fin_timeout
/proc/sys/sunrpc/tcp_max_slot_table_entries
/proc/sys/sunrpc/tcp_slot_table_entries
/proc/sys/sunrpc/transports
/proc/sys/sunrpc/udp_slot_table_entries
/proc/sys/vm/admin_reserve_kbytes
/proc/sys/vm/block_dump
/proc/sys/vm/compact_memory
/proc/sys/vm/compact_unevictable_allowed
/proc/sys/vm/dirty_background_bytes
/proc/sys/vm/dirty_background_ratio
/proc/sys/vm/dirty_bytes
/proc/sys/vm/dirty_expire_centisecs
/proc/sys/vm/dirty_ratio
/proc/sys/vm/dirty_writeback_centisecs
/proc/sys/vm/dirtytime_expire_seconds
/proc/sys/vm/drop_caches
/proc/sys/vm/extfrag_threshold
/proc/sys/vm/hugepages_treat_as_movable
/proc/sys/vm/hugetlb_shm_group
/proc/sys/vm/laptop_mode
/proc/sys/vm/legacy_va_layout
/proc/sys/vm/lowmem_reserve_ratio
/proc/sys/vm/max_map_count
/proc/sys/vm/memory_failure_early_kill
/proc/sys/vm/memory_failure_recovery
/proc/sys/vm/min_free_kbytes
/proc/sys/vm/min_slab_ratio
/proc/sys/vm/min_unmapped_ratio
/proc/sys/vm/mmap_min_addr
/proc/sys/vm/nr_hugepages
/proc/sys/vm/nr_hugepages_mempolicy
/proc/sys/vm/nr_overcommit_hugepages
/proc/sys/vm/nr_pdflush_threads
/proc/sys/vm/numa_zonelist_order
/proc/sys/vm/oom_dump_tasks
/proc/sys/vm/oom_kill_allocating_task
/proc/sys/vm/overcommit_kbytes
/proc/sys/vm/overcommit_memory
/proc/sys/vm/overcommit_ratio
/proc/sys/vm/page-cluster
/proc/sys/vm/panic_on_oom
/proc/sys/vm/percpu_pagelist_fraction
/proc/sys/vm/stat_interval
/proc/sys/vm/swappiness
/proc/sys/vm/user_reserve_kbytes
/proc/sys/vm/vfs_cache_pressure
/proc/sys/vm/zone_reclaim_mode
[root@localhost sys]# find /proc/sys -type f | wc
    825     825   32858

[root@localhost sys]# ls
abi  crypto  debug  dev  fs  kernel  net  sunrpc  vm