document updated a month ago, on Sep 19, 2024

init or systemd, in Linux

To check whether the current system runs init or systemd:

    ps ax | head -2

systemd

For the highest-level status:

    systemctl

For status on a specific "unit":

    systemctl status httpd.service

To restart a specific "unit":

    systemctl restart httpd.service

For the details that went into that "unit":

    systemctl show httpd.service

For the highest-level status:

    service --status-all

For status on a specific service:

    service httpd status

To restart a specific service:

    service httpd restart

For the details that went into that service:

    vim /etc/rc.d/init.d/httpd