ERROR: Plesk Unit File Error.
Step 01: Login plesk control panel to check if the ERROR display or not.
If the ERROR display, follow the below steps.
Step 02: Connect the server via SSH.
Step 03: Create a directory.
# mkdir /root/example
Step 04: Move session files from /run/systemd/system.
# mv /run/systemd/system/session-*.scope* /root/example/
Step 05: Restart services from the error message
# service sw-engine restart
N.B.: If the issue has not been resolved with the above solution, please follow the below mentioned process from your system.
Step 01: Connect the Server.
Step 02: Run the below command.
# systemctl | grep abandoned | wc -l (To check abandoned files)
# time /bin/systemctl list-unit-files (To check the list of unit files)
# wget https://plesk.zendesk.com/hc/article_attachments/360044074594/cleanup_systemd_sessions.zip ( To download the script file )
Step 03: Extract the zip file using the below command.
# unzip cleanup_systemd_sessions.zip
Step 04: Now, schedule a cron task which will run every one hour interval.
Create a cron task that will execute this script every hour, Open the crontab editor:
# crontab -e
Add the below line in the file.
0 * * * * /root/cleanup_systemd_sessions.sh