Useful linux / unix tutorials written by me
In this tutorial I will show you step-by-step instructions how to make cheap and secure encrypted backups of you webserver (or any other dir) files on you linux server using Amazon Storage Service
Continue reading Auto webserver and database backup with GPG encryption to Amazon S3
After some research and digging, I made my nginx and domain configuration files. If I have something missed, you are welcome to write it in comment here or at Github. Mostly everything are commented so to understand code should be not problem.
For this approach i will use my slackpost.sh script to send messages to Slack. More info about it you can find – https://mindau.de/blog/en/en-post-messages-slack-linux/
Continue reading How to send notifications from Linux fail2ban, ssh auth and other actions to Slack
Mostly is very usefull to know if one or another website is down. Here is simple example to monitor your websites:
| #!/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:
Firstly you need to create webhook url in slack. How to do it you can find at https://www.programmableweb.com/news/how-to-integrate-webhooks-slack-api/how-to/2015/10/20
Secondly you need for example a bash script. My version you can find in gist:
