Ubuntu Linux

Any missing versions within a description are not statements of unavailability. Though I am sure I used them, I simply do not remember testing these commands in other versions of Ubuntu, and would rather not list them if not one-hundred percent confident in their existence.

If there is an asterisk within the version, that command is most likely as universal a command as could exist.

Calender

cal

Installed by default, and shows the current month. [v18.04]

cal -3

There are quite a few nice options for cal, such as '-3' which shows the previous, current, and next month surrounding today. [v18.04]

Change Directory

cd

Change the shell working directory. Recommend 'cd --help' to learn more options of cd. [v*,16.04,18.04]

Disk Free

df

Reports file system disk space usage. [v16.04,18.04]

Free Memory

free

Display amount of free and used memory in the system. [v18.04]

List Directory Contents

ls

List directory contents. Highly recommend 'man ls' to learn more options of ls. [v*,16.04,18.04]

Linux Standard Base - Version

lsb_release -a

This will return the exact release version of Ubuntu Linux installed. [v16.04,18.04]

Present Working Directory

pwd

Print name of current/working directory. [v16.04,18.04]


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