A collection of system administration hints and tips, tricks and articles for the Linux operating system in all its variants.

Latest posts

Changing UIDs and GIDs for a user

A quick procedure to change the UID and GID for a given user using the usermod and groupmod commands.

Creating a local yum repository for Puppet

Puppets automated management of installed applications and libraries can be enhanced with custom package repositories such as a custom repository.

Changing Oracle Enterprise Linux hostname

Either due to cloning or corporate naming standards, you may find the need to change the hostname of an Oracle Enterprise Linux System.

$TMPDIR environment variable

Setting the $TMPDIR environment variable is a must if your users or applications generate lots of temporary files.

Red Hat 6 (RHEL) run levels

The idea behind SysV init runlevels revolves around the idea that different systems can be used in different ways.

Switching to a GUI login on RHEL 6

To switch to a graphical environment, you may need to install additional software from the RHEL Internet repository or installation DVD.