Linux : 7Zip

Download 7Zip from http://sourceforge.net/projects/p7zip/

After download :

cd p7zip_9.20.1
make all

# p7zip_9.20.1/bin/7za x cloudera-quickstart-vm-5.1.0-1-kvm.7z

7-Zip (A) [64] 9.20  Copyright (c) 1999-2010 Igor Pavlov  2010-11-18
p7zip Version 9.20 (locale=en_US.UTF-8,Utf16=on,HugeFiles=on,8 CPUs)

Processing archive: cloudera-quickstart-vm-5.1.0-1-kvm.7z

Extracting  cloudera-quickstart-vm-5.1.0-1-kvm/cloudera-quickstart-vm-5.1.0-1-kvm.qcow2
Extracting  cloudera-quickstart-vm-5.1.0-1-kvm

Everything is Ok

Folders: 1
Files: 1
Size:       32828686336
Compressed: 3112562928