Make yourself a command line $/$ file permissions cheat sheet to use for the rest of this class $($and program!$)$

Be sure to include the following:

~ explain file permissions and how they are assigned in Linux. Be sure to reference $4,2,1$ in your explanation. What do each of those numbers mean?

~ How can you get$/$access help at the command line?

~ How can you access the history of your typed commands?

~ Define these file commands: ls$,$ ls $-$al$,$ cd$,$ pwd$,$ mkdir, rmdir, rm$,$ rm $-$R$,$ mv$,$ cp$,$ touch, cat

a perfect example of what it would look like?