![mkdir](https://openlab.citytech.cuny.edu/malvarez/files/2014/10/mkdir.png)
mkdir makes or creates a directories on the file system so here it made dir_documents
![cp](https://openlab.citytech.cuny.edu/malvarez/files/2014/10/cp.png)
cp copies files and the directories here it copied file1 to dir_documents
![mv](https://openlab.citytech.cuny.edu/malvarez/files/2014/10/mv.png)
mv it moves files so here i moved file1 to the music folder
![rm 2](https://openlab.citytech.cuny.edu/malvarez/files/2014/10/rm-2.png)
rm it deletes files so in this case i removed file1 and dir_ documents
![help](https://openlab.citytech.cuny.edu/malvarez/files/2014/10/help.png)
help displays the information about the bulletin commands
![man](https://openlab.citytech.cuny.edu/malvarez/files/2014/10/man.png)
man is the manual of Linux but here there was no manual found
![whatis](https://openlab.citytech.cuny.edu/malvarez/files/2014/10/whatis.png)
whatis displays a short manual page descriptions. so here it displayed bash manual description
![alias](https://openlab.citytech.cuny.edu/malvarez/files/2014/10/alias.png)
alias instructs the shell to replace one string with another when executing commands. So here I put echo bark and came out “bark”