(Optional) Remove the specific database user created for Observium: DROP USER 'observium'@'localhost'; FLUSH PRIVILEGES; EXIT; Use code with caution. Step 4: Delete the Observium Files

Observium relies heavily on cron jobs for polling and discovery. If you don't disable these first, the system will continue trying to run scripts that you are about to delete, leading to a flood of local error logs. Open the cron configuration: sudo nano /etc/cron.d/observium Use code with caution.

If the output is empty (aside from your grep command), the uninstallation is successful. Summary Checklist Cron jobs deleted Apache/Nginx virtual host removed MySQL database and user dropped /opt/observium directory deleted Unused packages purged

Be careful with this step if you have other websites or tools running on the same Ubuntu instance.

Are you planning to with another monitoring tool like LibreNMS or Zabbix , or are you decommissioning the server entirely?