--help since Debian 9 (Stretch);
-? since Debian 9 (Stretch);
-man since Debian 9 (Stretch).
-@ until Debian 7 (Wheezy);
-A until Debian 7 (Wheezy);
-C until Debian 7 (Wheezy);
-M until Debian 7 (Wheezy);
-P until Debian 7 (Wheezy);
-R until Debian 7 (Wheezy);
-S until Debian 7 (Wheezy);
-a until Debian 7 (Wheezy);
-ac until Debian 7 (Wheezy);
-ar until Debian 7 (Wheezy);
-b until Debian 7 (Wheezy);
-c until Debian 7 (Wheezy);
-ckpt until Debian 7 (Wheezy);
-clear until Debian 7 (Wheezy);
-cwd until Debian 7 (Wheezy);
-dc until Debian 7 (Wheezy);
-display until Debian 7 (Wheezy);
-dl until Debian 7 (Wheezy);
-e until Debian 7 (Wheezy);
-h until Debian 7 (Wheezy);
-hard until Debian 7 (Wheezy);
-help until Debian 7 (Wheezy);
-hold_jid until Debian 7 (Wheezy);
-hold_jid_ad until Debian 7 (Wheezy);
-i until Debian 7 (Wheezy);
-inherit until Debian 7 (Wheezy);
-j until Debian 7 (Wheezy);
-js until Debian 7 (Wheezy);
-jsv until Debian 7 (Wheezy);
-l until Debian 7 (Wheezy);
-m until Debian 7 (Wheezy);
-masterq until Debian 7 (Wheezy);
-noshell until Debian 7 (Wheezy);
-nostdin until Debian 7 (Wheezy);
-notify until Debian 7 (Wheezy);
-now until Debian 7 (Wheezy);
-ot until Debian 7 (Wheezy);
-p until Debian 7 (Wheezy);
-pty until Debian 7 (Wheezy);
-q until Debian 7 (Wheezy);
-sc until Debian 7 (Wheezy);
-shell until Debian 7 (Wheezy);
-soft until Debian 7 (Wheezy);
-sync until Debian 7 (Wheezy);
-t until Debian 7 (Wheezy).