The most fundamental tool needed to administer a cluster is a parallel shell, which allows you to run the same command on a series of nodes. In this article, we look at pdsh.

The fish shell provides many features that rival the well-known Bash. We examine some highlights.

The Byobu session manager extends the shell, adding a range of useful functions, such as splitting the screen, running programs in the background, or organizing programs in tabs. In particular, administrators who rely on SSH will appreciate Byobu.