Is there any way to list systemd services in linux "in-the-order-of" they were loaded?

systemd yocto
user3128488 picture user3128488 · Mar 27, 2015 · Viewed 9.2k times · Source

I am trying to understand the dependencies between different systemd services in my new project. We are using yocto build system and systemd/system services.

If I perform,

systemctl -l

It will list all the services in alphabetic order. But I am specifically looking for any commands/scripts that can be used for listing systemd services "in-the-order-of" they were loaded.

Please help.

Answer

shibley picture shibley · Mar 27, 2015

Unfortunately, due to the parallel nature of the boot up process and the potentially complex dependency relationships among services, the service start up order isn't very deterministic. However, systemd-analyze, if present on your system, can graphically plot the start up order of services:

systemd-analyze plot > startup_order.svg

It can also be used to graphically plot service dependencies:

systemd-analyze dot | dot -Tsvg > systemd.svg

Related questions

How can i use iptables on centos 7?

I installed CentOS 7 with minimal configuration (os + dev tools). I am trying to open 80 port for httpd service, but something wrong with my iptables service ... what's wrong with it? What am I doing wrong? # ifconfig/sbin/service iptables save bash: …

Read More
How to redirect output of systemd service to a file

I am trying to redirect output of a systemd service to a file but it doesn't seem to work: [Unit] Description=customprocess After=network.target [Service] Type=forking ExecStart=/usr/local/bin/binary1 agent -config-dir /etc/sample.d/server StandardOutput=/…

Read More
Fixing a systemd service 203/EXEC failure (no such file or directory)

I'm trying to set up a simple systemd timer to run a bash script every day at midnight. systemctl --user status backup.service fails and logs the following: backup.service: Failed at step EXEC spawning /home/user/.scripts/backup.sh: …

Read More