I am trying to write a one line command that will:

write any file name in the /etc directory that has an extension of .cfg to a file named mywork (the file mywork has not been created yet).

Any suggestions on what command I can use to accomplish this.

Is this a homework assignment?

Yes it is, and after spending hours to try and find it in my book I am resorting to other methods, whcich in this case are the forums

OK. I don't like to give homework answers directly, but I'm happy to point you in the right direction. There's some terminology you'll need to know to find the info.

Commands which print output can have that output redirected to a file. This is done by the shell (the program which runs inside a terminal window - it read commands, execute them and prints their output). The shell on most Linux systems is called bash. If you look up the bash documentation and search for redirection, that should tell you how to do it.

After that it's just a matter of finding the right command. You can use several for this purpose. ls is probably the one you want. To work out how to list a specific directory's contents, see the documentation

Most Linux systems ship with documentation for both these things in the system manual. To access the system manual, you can type in "man subject" in a terminal window. You can use space to page down, up and down cursors to move a little bit, / to serach, and q to quit.

So to see the manual page for bash, type "man bash", and likewise "man ls" for the ls documentation.

man find

--Ian