root@gcomputer:~# systemctl status x11-common
● x11-common.service
Loaded: masked (/dev/null; bad)
Active: inactive (dead)
I tried systemctl unmask x11-common and systemctl unmask x11-common.service but that did not change anything.
How do I unmask it?
I installed MariaDB server to my machine. While setting up, I was met with the problem of whether I should have it enabled all the time, as the documentation I follow suggests with these steps:
sudo yum install mariadb mariadb-server
sudo systemctl start mariadb.service
sudo systemctl enable mariadb.service
When I run the command sudo systemctl list-unit-files (I think the sudo is optional), I get output which shows all services and their state.
Here is a snippet from my machine:
UNIT FILE STATE
...
debian-fixup.service static
debug-shell.service disabled
display-manager.service enabled
dns-clean.service enabled
dsmcad.service enabled
emergency.service static
failsafe-x.service static
friendly-recovery.service masked
fuse.service masked
gdm.service masked
getty-static.service static
[email protected] enabled
gpsd.service indirect
[email protected] static
gpu-manager.service enabled
halt-local.service static
halt.service masked
hostname.service masked
...
I wonder why some services are in the "masked" state. I think this means, "this is better than 'disabling', because the service cannot be started, neither by hand or by systemd".
How can I get more information about the state of a service unit?
Who has put the units into their respective state?
I tried, for example,
sudo systemctl help dsmcad - that only brings up the documentation = ... line from the unit file. /etc/systemd/system/dsmcad.service
Note: Here I know exactly what dsmcad service is and what it does, I have installed it myself. I am more interested in a general solution.
I just upgraded from Ubuntu server 14 to version 15. I had trouble getting my upstart script working after the upgrade, and read that systemd is the new default. I'm far from a linux expert, so please go easy on me :-)
Here is what my upstart script was before:
description "NZBGet upstart script"
setuid robert
setgid robert
start on runlevel [2345]
stop on runlevel [016]
respawn
expect fork
script
exec nzbget -D
end script
pre-stop script
exec nzbget -Q
end script
Based on the upstart to systemd wiki page, I used the tables provided there to map things as closely as I could in my new systemd service file:
[Unit]
Description=NZBGet Service
[Service]
Type=forking
ExecStart=/usr/local/bin/nzbget -D
ExecStop=/usr/local/bin/nzbget -Q
Restart=on-failure
This file is located at /home/robert/.config/systemd/user/nzbget.service. To start the service manually, I've been doing:
$ systemctl --user start nzbget
This works great. However, when I log out of my SSH session, the service shuts down. Also, it does not start on bootup or user login. I want it to behave the same as it did as an upstart service: I want it to start at boot, run constantly, and as a specific user.
What do I need to do to get this configuration?
Is there a command to list services that run on startup? I imagine it would involve parsing /etc/init.d/, and the various /etc/rc.* directories.