Add RPMForge repository CentOS 6 32Bit i686
wget https://packages.sw.be/rpmforge-release/rpmforge-release-0.5.2-2.el6.rf.i686.rpm rpm -ivh rpmforge-release-0.5.2-2.el6.rf.i686.rpm
or
Add RPMForge repository CentOS 6 64Bit
wget https://packages.sw.be/rpmforge-release/rpmforge-release-0.5.2-2.el6.rf.x86_64.rpm rpm -ivh rpmforge-release-0.5.2-2.el6.rf.x86_64.rpm
Install 7z on Centos 6 or RHEL 6
yum install p7zip
Extract file from Terminal
7za x rahmatriyanto.7z
Compress on Linux
7za a -mx=9 rahmatriyanto.7z [your filename or directory]