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How to debug systemd problems
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*Foreword*
If you are experiencing a problem with system boot up due to systemd, please see the link:Bugs/Common[common bugs] document before filing a bug. Some easy configuration tweaks that fix a wide range of issues may be listed there. If the problem you are seeing is not listed there or none of the workarounds seem to help, please consider filing a bug to help us make Fedora run better on your hardware.
Debugging systemd problems
Various useful systemd related commands
Run `systemctl list-jobs`
To identify slow boot and look for the jobs that are "running" those jobs are the ones where boot waits for completion on and the ones that listed as "waiting" will be executed only after those which are "running" are completed.
Run `systemctl list-units -t service --all`
To list all available services and their current status