[Linux] # yum -y install yum-fastestmirror for Automatic Fast Repository Selection

Installing the yum-fastestmirror plugin on CentOS so yum automatically picks the fastest mirror.

[yum] How to Configure Not to Use fastestpath

Disable yum's fastestmirror plugin so it stops selecting ftp-only mirrors in proxy environments where ftp is blocked.

[yum] Solution for 'Another app is currently holding the yum lock'

Fix yum's `Another app is currently holding the yum lock` error by killing the background yum process holding the lock.

yum upgrade from CentOS 6.6 to 6.9

Upgrading a server from CentOS 6.6 to 6.9 via yum, with before/after PHP and MySQL versions.