What are console commands that everyone should know?

[askyourpc.com]

It seems as if knowing console commands can get you places with Linux. What are some of the common ones that I or most people should know?

[arkticcool]

Here is a cheat sheet of the most important terminal commands you will ever need to know;
http://files.fosswire.com/2008/04/ubunturef.pdf

And here is a cheat sheet of absolute beginner commands;
http://fosswire.com/wp-content/uploa.../fwunixref.pdf

[ModelM]

One of the most important ones for newcomers is

apropos

This will look up commands which are apropriate (apropos) for the task you want to accomplish.

Lets say you are at the command line & want to copy a file. There is no "copy" command so all you get are errors. Obviously there must be a way to copy files, but what is the command?

Just type

apropos copy

to see a list of all the commands related to the word "copy". You can then read the short description listed or look at the man page for each command listed.

The "apropos" inquiry is useful to find your way when you know what you want to do but are unsure of the command.