Service as Root

Server script:

/usr/local/bin/test1.sh


#!/bin/bash
while :
do
   echo “Running ...”
   logger $(date)
   sleep 10
done

chmod +x /usr/local/bin/test1.sh

Service config:

/etc/systemd/system/test1.service




[Unit]
Description= Simple test service

[Service]
Type=simple
ExecStart=/usr/local/bin/test1.sh

[Install]
WantedBy=multi-user.target

Manage it:

sudo chmod 664 tracker.service
sudo systemctl daemon-reload

sudo systemct enable tracker
sudo systemct start tracker
sudo systemct status tracker

sudo cat /var/log/syslog

Service as Non-root

• Run as a non-root user
• Restart automatically when not running
• Attempt restart after 1 second ( default is 100ms )
• Make sure it starts after network and nss-lookup are up
• Attempt to restart forever ( StartLimitIntervalSec=0 ) ( default stop after 5 fails in 10 secs )

[Unit]
Description= Simple test service
After=network.target nss-lookup.target
StartLimitIntervalSec=0

[Service]
Type=simple
Restart=always
RestartSec=1
User=prduser
ExecStart=/usr/local/bin/test1.sh

[Install]
WantedBy=multi-user.target

More Info

Type = simple            # for a program that starts and just keeps running, sucess right after fork
Type = exec              # almost the same, sucess after both fork and binary up and running
Type = forking           # for a program that daemonizes itself ( launcher returns after forking )
Type = oneshot           # for one shot serrvices that don't keep running