TERMINAL SHELL SWITCHING

Switching shells attached to a terminal. Suppose that a shell has already output text into the terminal, and at that point a new shell is to be attached to the terminal. That subsequent shell is then started up, and text output is gathered from that new shell. Content representing that new shell is then displayed in the terminal. As an example, if the output is the same for the new shell as it was for the old shell, the terminal can just keep the old output displayed in the terminal, and eliminate the need to also output the identical output from the new shell. If the output of the new shell is different than that of the old shell, the terminal may be refreshed and the new content rendered perhaps in a single frame and/or without displaying text associated with this switching activity.