217
votes
Accepted
How to see the latest x lines from systemctl service log
journalctl --unit=my.service -n 100 --no-pager
- 51.4k
73
votes
Accepted
One systemctl command to both start and enable
Yes, there is, since systemd 220 (May 2015):
systemctl enable --now
This will enable and start the named units. See the systemctl manpage for details.
- 450k
48
votes
How to see the latest x lines from systemctl service log
If you want to see the last n number of lines and see new messages as they are printed to the log, try this:
journalctl -u <service name> -n <number of lines> -f
Where -n indicates the ...
- 721
34
votes
How to see the latest x lines from systemctl service log
Just:
journalctl -u SERVICE_NAME -e
Parameter -e stands for:
-e --pagerend; Immediately jump to the end of the journal inside the implied pager tool. This implies -n 1000 to guarantee that the ...
- 441
32
votes
Accepted
pm-suspend vs systemctl suspend?
In short, you should generally prefer the suspend mode integrated by your distro. For distros that ship systemd, that's typically systemctl suspend.
For instance, the Arch Linux wiki says:
systemd ...
- 22.1k
30
votes
Accepted
the --now switch of `systemctl`
I've found that annoying as well.
Looks like the --now switch was added in version 220 (see this line in the changelog), and CentOS 7 is currently on version 219. Hopefully soon then!
You can check ...
- 500
27
votes
Accepted
How to disable CUPS service on reboot with systemd?
No, activation does not happen because of preset.
systemctl disable cups will only prevent it from auto-starting.
It's possible that it was started anyway because it was required for another service....
- 1,841
23
votes
systemd: Can't unmask root mount (-.mount)
I was getting the same while performing step 6 in this answer: https://askubuntu.com/a/1028709/1003629.
By trial and error I found this was no longer an issue if I closed GParted.
Edit after I got ...
- 333
19
votes
Accepted
Watch systemd service status with systemctl
You could use the watch command to watch the output of systemctl status tor:
watch systemctl status tor
You can also follow the systemd logs for the service, which may also be useful:
journalctl -u ...
- 2,455
17
votes
Accepted
How to remove service from autostart?
If your system has both:
chkconfig service off
systemctl disable service
RHEL5 uses chkconfig by default. On a side note, I recommend upgrading because RHEL 5 has been EOL since March 31st, 2017 ...
- 11.7k
16
votes
How to see the latest x lines from systemctl service log
You could pipe the output to tail:
journalctl --unit=my.service | tail -n 300
The tail command prints the last lines (10 by default) received in stdin to stdout.
Edit: as noted in the comments, this ...
- 30.4k
16
votes
How can I reboot a server with systemctl if systemctl reboot fails?
If Zach Sanchez' answer doesn't work (I got Failed to start reboot.target: Connection timed out for my systemctl --force reboot in a strange situation under CentOS 7) making the kernel basically crash ...
- 261
14
votes
Accepted
Systemctl status always shows full log, even with --lines
The command systemctl status display the status of the service and the corresponding lines from journalctl, the --lines=3 will limit the displayed number of lines from the journal to 3. e,g:
systemctl ...
- 67.7k
14
votes
Accepted
How can I reboot a server with systemctl if systemctl reboot fails?
As weird as it may seem, trying running
systemctl --force --force reboot
It has popped up in a couple of searches I made. It may be related to issues with a DBus service restarting.
Can't reboot. ...
- 364
13
votes
Accepted
redhat 7 + How to stop systemctl service permanent
systemctl disable servicename.
Running systemctl disable removes the symlink to the service in /etc/systemd/system/*.
From now on, that service won't start on boot anymore.
- 22.1k
13
votes
Accepted
What does Restart=on-abort mean in a systemd service?
The systemd.service can be configured to restart a service based on a number of conditions. This systemctl man page has a good explanation of the reasons and reasons are included in this answer so ...
- 624
11
votes
Accepted
Show journal logs from the time a service was restarted
You can use the invocation id, which is a unique identifier for a specific run of a service unit.
It was introduced in systemd v232, so you need at least that version of systemd for this to work.
To ...
- 22.1k
11
votes
Have systemd not kill your service if it is in a state it should not be killed
This answer is primarily based on the documentation for systemd.kill, but has been updated after doing some tests. It is admittedly not a perfect solution to this problem.
By setting SendSIGKILL=no ...
- 8,491
11
votes
Accepted
systemctl list all possible (including disabled) services
OK I asked "the systemd guys" and they said in old versions it didn't list them all, despite the man page saying this:
-a, --all
When listing units, show all loaded units, regardless of ...
- 1,777
11
votes
systemd: Can't unmask root mount (-.mount)
You could try removing the -.mount
sudo rm /run/systemd/system/-.mount
and then reloading systemd
sudo systemctl daemon-reload
- 111
11
votes
Accepted
What are these > at the right of unterminated lines, when I do a systemctl status or a journalctl for example?
You can see the full text using the Right Key (>) of your keyboard.
If I'm not wrong when you use some commands like journalctl options..., systemctl options... these page their output through less ...
- 4,935
10
votes
redhat 7 + How to stop systemctl service permanent
There is also a stronger version of the disable command, which is mask. From the manual:
mask UNIT…
Mask one or more units, as specified on the command line. This will link these unit files to ...
- 8,491
10
votes
How should i enable UFW: through "systemctl enable" or "ufw enable"?
If you do ufw enable, systemctl disable ufw and then reboot the system, what is the ufw status verbose output after the reboot?
I'm guessing that it will be inactive.
If that's true, then the ...
- 102k
10
votes
Accepted
Reason for processing `systemctl status` via command substitution?
There’s no reason, other than possibly ignoring systemctl’s exit status (that would depend on the surrounding setup). There might be historical factors explaining why the command is written that way, ...
- 450k
9
votes
systemctl list all possible (including disabled) services
List every loaded service that is running, active, or failed in the system:
# sudo systemctl list-units --type=service --all
List all Disabled services in the system:
# sudo systemctl list-unit-files ...
9
votes
Systemd auto restart service not working if it stopped
The Restart setting doesn’t work like that; quoting the manual,
When the death of the process is a result of systemd operation (e.g. service stop or restart), the service will not be restarted.
...
- 450k
8
votes
How to disable CUPS service on reboot with systemd?
The cups package ships three systemd unit files: cups.service, cups.socket and cups.path.
The latter two are used for socket activation and path activation, which will end up triggering the service ...
- 22.1k
8
votes
Will a systemd service automatically manage it's logs (do log rotation etc)
According to the systemd documentation, the logs kept by journald default to a size limit of 15% of disk capacity or 4GB, whichever is smaller. If /var is not mounted, not writable, or /var/log/...
- 319
8
votes
Accepted
Run a binary file via systemctl
In order to run a binary as service you can follow these steps:
Write a service file named MFBot_Konsole.service:
[Unit]
Description=MFBot_Konsole
After=network.target
[Service]
Type=simple
...
- 210
Only top scored, non community-wiki answers of a minimum length are eligible