Mostly is very usefull to know if one or another website is down. Here is simple example to monitor your websites:
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| #!/bin/sh | |
| # script to check website status (online/ofline) | |
| while read site | |
| do | |
| if ping -w 60 -c1 -q "$site" &>/dev/null; then | |
| echo "$site is up" # for debug | |
| else | |
| # action to do if website offline | |
| echo "[$(date +%d-%m-%Y:%H:%M:%S)] $site is not reachable." | slackpost.sh | |
| fi | |
| done < /path/to/file/sites.txt # list of sites to check |
sites.txt example
website1.com website2.com
Now you can add it to crontab. Type crontab -e and insert:
# ping websites every minute * * * * * /path/to/monitor-websites.sh > /dev/null
The script use my notification function to slack. This tutorial you can find at [Tutorial] send message with linux to slack
Example of message in slack if website is offline:
Very nice tutorial. Thak you
Im not very advanced programmer, but i found this tutorial very useful and easy to understand.