Logging into to single user mode allows you to access the system as root without a password. This is especially useful when you need to troubleshoot or gain access to a system in order to fix a problem.

Rebooting and shutting down a system can be handled in multiple ways. You can handle these tasks using tools like shutdown, reboot, and init.

Switching runlevels is an essential skill for a Linux administrator. The ability to switch to runlevel 1 for installs or migrations helps admins keep their data secure which causes less possibilty for issue.

Using the man, info, and document files is a good way in learning how to properly use the different tools available to you on a linux machine.

Being able to manage permissions on a Linux system is essential to any system administrator. There are tools available for setting permissions and ownership’s as well as viewing those same permissions and ownership.

Linux Hard links and soft links are like shortcuts to the file or folder you reference. A hard link is more like a duplicate file sharing the inodes or location on the hard disk. A soft link is more like a windows shortcut.

This is an overview on the tools needed to successfully create, copy, move, and rename files and directories.

There are many ways in creating and even editing files. You can use commands such as vim and touch to create and edit files.

Linux Compression utilities are useful for archiving.

Logging into different users is a pretty straight forward process via terminal. When first booting your system you’ll be brought to a login screen either in terminal or GUI. If a terminal login appears, odds are you are in runlevel 3. If the GUI login screen appears then you’re most likely in runlevel 5.