shell script to restart a tomcat server if down

Question

I want a shell script to run as a cron job every half hour to check if server is running or not, if not then turn it back on.

Answer 1

Try using systemd isntead of a cron job. Create one file for the service and the one other for timer.

example:

/etc/systemd/system/example.service

[Unit]
Description=example job

[Service]
Type=oneshot
ExecStart=/bin/bash /tmp/1.sh

/etc/systemd/system/example.timer

[Unit]
Description=example

[Timer]
OnUnitActiveSec=500s
OnBootSec=500s

[Install]
WantedBy=timers.target

reload the systemd using
systemctl daemon-reload
and use the systemctl command to start and enable the
systemctl start test.timer

systemctl enable test.timer

Hope this helps