#!/bin/bash
regex="plexdrive.*Could not update/save object"

journalctl -f -n 0 |
while read line
do
    if [[ "$line" =~ $regexp ]]; then
        systemctl restart pd4g
        systemctl restart pd4x
        systemctl restart pd4n
        echo I restarted the service at $(date) >> /home/user/logs/log.txt
        /bin/sleep 30
    fi
done