Identify sar -d devices in Solaris and Linux

Sar is one of the most powerful performance measuring tools available for Linux, FreeBSD and Solaris or Illumos based distros, one of the issues most people encounter is mapping the disks when using sar -d.

Set up a NIS server - client

Network Information Service (NIS) is a protocol developed by Sun to allow one to defer user authentication to a server.

Increase the size of the root partition in CentOS 7, RHEL 7 on ESXi 5.5

The root filesystem is almost at full capacity. The filesystem must be increased. 
This is a VM running on ESXi 5.5.