systemd --version (return code: 0)
systemd 229
+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ -LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN
systemd --help (return code: 0)
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[=BOOL] Dump core on crash
--crash-vt=NR Change to specified VT on crash
--crash-reboot[=BOOL] Reboot on crash
--crash-shell[=BOOL] Run shell on crash
--confirm-spawn[=BOOL] Ask for confirmation when spawning processes
--show-status[=BOOL] Show status updates on the console during bootup
--log-target=TARGET Set log target (console, journal, kmsg, journal-or-kmsg, null)
--log-level=LEVEL Set log level (debug, info, notice, warning, err, crit, alert, emerg)
--log-color[=BOOL] Highlight important log messages
--log-location[=BOOL] 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