VPN INSTALLATION FOR LINUX

There are three different VPN options available for Linux/GNU, BSD and UNIX systems

 
OpenVPN recommended
OpenVPN is the best choice for all desktop users of Linux or BSD. It is extremely fast, secure and reliable.

 Installing OpenVPN on Linux (NM)

 Installing OpenVPN on Linux (CLI)

 

L2TP/IPsec
L2TP/IPSec is the recommended replacement for PPTP, but linux support is not so good as for PPTP.

Installing L2TP/IPSec on Linux

 

PPTP
PPTP has some security problems and should only be used as last option or where nothing else works with your device or setup.

Installing PPTP on Linux