A sysadmin would need to execute shell commands in Python scripts. Learn how to execute shell commands in Python.
This detailed guide will give you enough information to start using Emacs, and enough extra to make you want more.
Here are different commands which can list the hard drives in Linux. There are others but these are the most common and easy to use commands to list the disks.
If you want to display the output of a command and save it to a file simultaneously, tee command is what you need. Learn various ways of using tee command in Linux.
Learn how to delete files and remove directories with rm command in Linux.
This quick tutorial shows you various methods to ping a specific port of a remote server.