This is a practical selection of the commands we use most often. Press <Tab> to see the listing of all available command (on your PATH). On my small home system, it says there are 2595 executables on my PATH. Many of these "commands" can be accessed from your favourite GUI front-end (probably KDE or Gnome) by clicking on the right menu or button. They can all be run from the command line. Programs that require GUI have to be run from a terminal opened under a GUI.
It will create on file called sshLog.txt you can also change file name if you want.
you can check your file whenever you want
Just put this line in your .bashrc file.
echo 'ALERT – Access on:'`who` > /home/<user>/Desktop/sshLog.txt