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Why is CRON not allowed to run systemctl?
So, if your problem is because cron is not allowed to run systemctl because you are already logged in, you might be able to get around that by playing with polkit but I have no experience there so I can’t help. An easy workaround is to use root’s crontab instead of your own.
What to do when Bash-crontab is not working?
Then run systemctl daemon-reload (once, and whenever you change reboot-script.service to tell systemd to re-read the configuration), then systemctl start reboot-script.service to start the process. If that works as expected, you can use systemctl enable reboot-script.service to make sure it starts at boot.
Why does CRON not work when executed from shell?
This is especially tricky, because the same command will work when executed from shell. The reason is that cron does not have the same PATH environment variable as the user. If your crontab command has a % symbol in it, cron tries to interpret it.
Why are my cron scripts not working in Ubuntu?
Using unqualified paths have also caused problems. The default path is usually /bin:/usr/bin so only standard commands will run. These directories usually don’t have the desired command. This also affects scripts using non-standard commands. Other environment variables can also be missing.
Why is cronjob not running in Linux stack overflow?
Lists all the user’s cron tasks. Starts edit session of your crontab file. When you exit the editor, the modified crontab is installed automatically. Removes your crontab entry from the cron spooler, but not from crontab file. Another reason crontab will fail: Special handling of the % character.
How to write Sudo systemctl hibernate Fron Cron?
After this, you can write sudo systemctl hibernate fron cron to hibernate. Note: Directly modifying /etc/sudoers is bad ; instead make a custom sudoers file under /etc/sudoers.d/ using the command – sudo visudo -f /etc/sudoers.d/custom.
What to do if systemctl is not running?
Users wishing to power down a system can also use sudo systemctl halt. Use the NOPASSWD: tag only if you do not want to be prompted for your password. (Note that the location of systemctl might be different on your system.) After this, you can write sudo systemctl hibernate fron cron to hibernate.