The command df:  displays free disk space

The command cd: it changes directory to a specific folder

The command file: this determines a type of file it

The command free: it shows us our memory usage

The command cal: this shows a calendar

The command pwd: it shows the file I’m working in

The command ls: it shows a list of many different files

The command less: helps edit commands also displays an output one screen at a time for some reason when I type the less command it couldn’t be read so I type the command less –help which gave me the summary on it