Hello!
42.1, systemd 210:
=====
k_mikhail@linux-mk500:~> systemctl --version
systemd 210
+PAM +LIBWRAP +AUDIT +SELINUX -IMA +SYSVINIT +LIBCRYPTSETUP +GCRYPT +ACL +XZ
+SECCOMP +APPARMOR
=====
1. Trying
k_mikhail@linux-mk500:~> systemctl -- <Tab><Tab>
Result:
=====
k_mikhail@linux-mk500:~> systemctl --
--after --ignore-dependencies --reverse
--all --kill-who --root
--before --no-ask-password --runtime
--defaults --no-block --signal
--fail --no-legend --state
--failed --no-pager --system
--force --no-reload --type
--full --no-wall --user
--global --privileged --version
--help --property
--host --quiet
2. Trying
k_mikhail@linux-mk500:~> systemd -- <Tab><Tab>
Result: no result. Empty field.
Only after explicit 'systemd --help' I got a list:
=====
k_mikhail@linux-mk500:~> systemd --help
systemd [OPTIONS...]
Starts up and maintains the system or user services.
-h --help Show this help
--test Determine startup sequence, dump it and exit
--no-pager Do not pipe output into a pager
--dump-configuration-items Dump understood unit configuration items
--unit=UNIT Set default unit
--system Run a system instance, even if PID != 1
--user Run a user instance
--dump-core[=0|1] Dump core on crash
--crash-shell[=0|1] Run shell on crash
--confirm-spawn[=0|1] Ask for confirmation when spawning processes
--show-status[=0|1] Show status updates on the console during
bootup
--log-target=TARGET Set log target (console, journal, syslog,
kmsg, journa
--log-level=LEVEL Set log level (debug, info, notice, warning,
err, crit
--log-color[=0|1] Highlight important log messages
--log-location[=0|1] Include code location in log messages
--default-standard-output= Set default standard output for services
--default-standard-error= Set default standard error output for services
Seems it's bug of bash-completion for systemd. Please, consider!