Hello jacatone :-)
Originally Posted by jacatone
What are the commands to create and remove a plain text document in say gedit? Also, what's the command to remove a program? Thanks.
If you want to create a plain text document using gedit you can use File->New and later File->Save As. If you start gedit without telling it to open a file it automatically does the File->New part for you.
Gedit cannot be used to remove files from the file system, regardless of whether they are plain text, programs, or whatever (excepting when it thinks you are are changing the the same file for more than once).
If you are asking about removing programs generally (nothing to do with gedit) then the answer depends on how the program got there in the first place. If it is something you created yourself you can just remove it both from the command prompt and using a GUI. If the program was installed using some package manager then best to remove it the same way so everything associated is tidied up nicely.