Topic 9

Dates: 4/3/2019
Start-up and Run Levels. Scheduled jobs (at, cron)
Linux System Administration


Adding service to systemd startup

In directory /home/hostadm, create a shell script file, test.sh: 

#!/bin/bash
echo current date/time is $(/bin/date) >> /home/hostadm/timecheck.txt

Make the script executable 

chmod 755  /home/hostadm/test.sh

In directory /lib/systemd/system, create unit service file, test.service: 

[Unit]
Description=test startup

[Service]
Type=simple
ExecStart=/home/hostadm/test.sh

[Install]
WantedBy=default.target

Enable service test in systemd: 

systemctl daemon-reload
systemctl enable test

Run commands 

systemctl start test
systemctl status test
Check if file /home/hostadm/timecheck.txt has been updated.
Reboot the VM. Run command 

systemctl status test
Check if file /home/hostadm/timecheck.txt has been updated.


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