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How to execute Linux-systemd script at shutdown only?
The install section tells systemd to add this service to the list that must be completed before poweroff.target or halt.target will be considered reached. This service is installed and running on my system. I have tested most of the post in here and various sites.
Is there a way to run only at reboot?
The only one that actually worked to run only at reboot (not on boot again – but actually failed when shutdown-halt-poweroff) is the post of @benoit2600 . his second/solution post But after testing I found that you can use in Unit all 4 target and will run when one of them actually used ONLY.
What does it mean when systemd says not to reboot?
In other-words Conflicts=reboot.target is meaningless at best and at worst it will prevent you from rebooting. Don’t do this. It does not mean don’t run this on reboot. It means abort either this service or the reboot.target depending on timing and how systemd interprets this erroneous use of conflicts.
What does ment mean in Linux systemd script?
It is ment to keep to conflicting services from being run at the same time. If a unit has a Conflicts= setting on another unit, starting the former will stop the latter and vice versa. Unit means a .service file ment to launch perticular service not a target to be reach.
What does conflict mean in Linux systemd script?
If a unit has a Conflicts= setting on another unit, starting the former will stop the latter and vice versa. Unit means a .service file ment to launch perticular service not a target to be reach. In other-words Conflicts=reboot.target is meaningless at best and at worst it will prevent you from rebooting. Don’t do this.
Is there a way to shut down a system without Sudo?
The context of your process (running in a full blown login session, if no other user is logged in) will allow you to shut the system down. you can use shutdown without providing a password. However you will still need sudo. But you could create an alias in .bashrc which replaces sudo shutdown now with shutdown
Is there a way to shut down a system without a password?
If your process lives in such an environment, you can call systemctl poweroff or systemctl reboot. The context of your process (running in a full blown login session, if no other user is logged in) will allow you to shut the system down. you can use shutdown without providing a password.