There are 100+ Linux distributions and some have desks and some do not.
And for the ones that have desks, there are several that may exist on a system – and two of the most popular are the GNOME and KDE desktops.
Linux Commands Training Tips: Unfortunately, the method of opening a terminal emulation window – in one Linux distribution, with one desktop – is not the same one one distro to another, or even from the same desktop in two different distros.
For example, at the GNOME desktop in one distro, you may need to select the System menu and then select "Terminal window" "and then in another, you may need to select a different main menu name and a different sub-menu name!
Also, the term used for a "terminal emulation window" is not the same one one Linux distro to another.
Here are some examples of menu items that you many need to select to get to a "terminal emulation window": "Terminal", "Virtual Terminal", "Command Prompt" and so on.
Also, in some Linux distributions you can simply right-click on the desktop and then select an item from the menu that appears (such as "Terminal", or similar) to get the command prompt, but in others, a menu option after right-clicking) is not available.
Linux Commands Training Tips: The Linux System Administration concepts, commands and tasks covered here apply to ALL other Linux distributions, including: Red Hat, Fedora, Ubuntu, Kubuntu, Edubuntu, Slackware, Debian, SUSE and openSUSE.
Working At the Linux Command Line Prompt
Once you get to the command line prompt, you can run commands to Linux System administration on server systems and desktop / workstation systems.
However, to run some of the commonly used system administration commands, such as userdel and groupadd you may need to do some additional steps, such as run the Linux su or sudo commands.