Add Cron Job to Restart CGMiner Service Periodically

README.md

1. SSH Into Controller
Self explainatory.

2. Create Shell Script
Create the folder, the file...

mkdir /usr/share/cron/  
vi /usr/share/cron/cgrestart.sh  

The script is...

#!/bin/sh
# This file is for cron job

C=`pidof cgminer | wc -w`
if [ "$C" != "1" ]; then
    /etc/init.d/cgminer stop
/etc/init.d/cgminer start
exit 0;
fi

A=`cat /tmp/cm.log`
B=`cgminer-api  | grep "^   \[Accepted\]"`
echo $B > /tmp/cm.log
if [ "$A" == "$B" ]; then
    /etc/init.d/cgminer stop
    /etc/init.d/cgminer start
exit 0;
fi

3. Assign Execute Permissions to Script

chmod 755 /usr/share/cron/cgrestart.sh

4. Add the Script to CronTab
Edit contrab with the crontab -e command and add the following line:

0 */4 * * * /usr/share/cron/cgrestart.sh

This example will force a restart every 4 hours.

Note:
For more examples on CronTab settings, check out: CronTab.Guru

Optional: Setup Alerts
Receive alerts whenever your job fails to launch or complete. Create an alert at WDT.io and add the following suffix to the job in crontab:

&& wget -qT 30 http://k.wdt.io/%ACCOUNT_ID%/%ALERT_NAME%

Example:

&& wget -qT 30 http://k.wdt.io/71gd72ha/myalert01