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[Solved] How can I make a custom .service run as root? (reddthat.com)

submitted 4 months ago* (last edited 4 months ago) by Telorand@reddthat.com to c/linuxquestions@lemmy.zip

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cross-posted from: https://reddthat.com/post/21668140

I have a VPN daemon that needs to run before the client will work. Normally, this would have been set up automatically by its install script, but the system is immutable.

I've created the systemd service via sysyemctl edit --force --full daemon.service with the following parameters:
[Unit] 
Description=Blah
After=network-online.target

[Service]
User=root
Group=root
ExecStart=/usr/bin/env /path/to/daemon

[Install]
WantedBy=multi-user.target
I've verified that the daemon is actually executable, and it runs fine when I manually call it via sudo daemon. When I try to run it with sudo systemctl enable --now daemon.service, it exits with error code 126.

What am I missing?

Edit: Typo, and added the relevant user and group to the Service section. Still throwing a 126.

Solution: the system wanted /usr/bin/env in ExecStart to launch the binary. The .service file above has been edited to show the working solution.

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[–] Telorand@reddthat.com 2 points 4 months ago

I added the relevant user and group, and it's still throwing a 126. I checked the daemon itself, and it looks like it's a pre-compiled binary. Manually running /bin/bash /path/to/daemon gives the same error, but sudo /path/to/daemon starts the daemon.