byobu includes a set of profiles for the GNU screen window
manager. These profiles are quite useful on server machines which are
not running a graphical desktop. The 'screen' command provides a
number of advanced features are not necessarily exposed in the default
profile. These profiles provide features such as status bars, clocks,
notifiers (reboot-required, updates-available), etc. The
profile-switcher allows users to quickly switch their .screenrc to any
of the available profiles.