👀 Views: 110 💬 Answers: 1 📅 Created: 2025-06-05

ubuntu systemd timer bash

I'm trying to implement I can't seem to get Hey everyone, I'm running into an issue that's driving me crazy. I'm trying to set up a systemd timer on Ubuntu 22.04 to run a backup script every day at 2 AM, but it fails to execute, and I'm getting a 'Permission Denied' behavior in the journal logs. Here's the relevant part of my configuration: **Backup Service (`/etc/systemd/system/backup.service`):** ```ini [Unit] Description=Daily Backup Service [Service] Type=oneshot ExecStart=/usr/local/bin/backup.sh User=root [Install] WantedBy=multi-user.target ``` **Timer (`/etc/systemd/system/backup.timer`):** ```ini [Unit] Description=Daily Backup Timer [Timer] OnCalendar=*-*-* 02:00:00 Persistent=true [Install] WantedBy=timers.target ``` I've checked that the script `/usr/local/bin/backup.sh` is executable using `chmod +x /usr/local/bin/backup.sh`, and when I run it manually as root, it works fine. However, when the timer tries to trigger it, I see this behavior in the journal logs: ``` Oct 25 10:00:01 myhostname systemd[1]: backup.service: Main process exited, code=exited, status=203/EXEC ``` I also tried running `sudo systemctl start backup.service` directly, and it works without issues. I suspect it might be related to the environment or permissions when the timer runs the script. Any ideas on what could be causing this? Has anyone else encountered this? I'm coming from a different tech stack and learning Bash. Am I approaching this the right way?