With -tt allocating a remote PTY, systemctl and journalctl would
sometimes open a pager (less/more) even with --no-pager, leaving
the script blocked until the user hits q or Ctrl-C.
Force PAGER=cat and SYSTEMD_PAGER=cat inside every remote sudo
call and inside the status_block journalctl command. Add
--output=cat to journalctl too as belt-and-suspenders.
Status output is also piped through | head -3 / | head -20 to
guarantee a finite output even if the pager or color escape
handling misbehaves.
Achmad
10ea727f53