In this article, we will show you how to install and configure Monit on Ubuntu 16.04. Monit is an open source tool for monitoring and managing, processes, files, directories and file systems on a UNIX system. You can use Monit to stop or restart your web server if it is using too much resources, to monitor daemon processes, to monitor files, directories and get an email alert or perform a predefined action if they change. With Monit you can also monitor your network connections, CPU usage, RAM memory load average and much more. This guide should work on other Linux VPS systems as well but was tested and written for an Ubuntu 16.04 VPS.
Login to your VPS via SSH
ssh [email protected]_server
You can install the monit package from the official Ubuntu repositories by issuing the following command:
sudo apt install monit
If you want to enable the Monit HTTP interface open the
/etc/monit/monitrc file and uncomment the following lines:
set httpd port 2812 and use address localhost # only accept connection from localhost allow localhost # allow localhost to connect to the server and allow admin:monit # require user 'admin' with password 'monit'
Reload the Monit service with the following command:
and you should be able to login to the Monit web interface at :
You can now configure Monit to monitor your processes, file systems and resources by editing the
Below are some example configurations:
check process nginx with pidfile /run/nginx.pid start program = "systemctl start nginx" with timeout 30 seconds stop program = "systemctl stop nginx" if cpu usage > 80% for 5 cycles then alert if failed port 80 protocol http then restart if 5 restarts within 10 cycles then timeout
check process php-fpm with pidfile /run/php/php7.0-fpm.pid start program = "systemctl start php7.0-fpm" with timeout 30 seconds stop program = "systemctl stop php7.0-fpm" if cpu usage > 80% for 5 cycles then alert if failed unixsocket /run/php/php7.0-fpm.sock then restart if 5 restarts within 5 cycles then timeout
check process mariadb with pidfile /run/mysqld/mysqld.pid start program = "systemctl start mariadb" with timeout 30 seconds stop program = "systemctl stop mariadb" if cpu usage > 80% for 5 cycles then alert if failed host 127.0.0.1 port 3306 then restart if 5 restarts within 5 cycles then timeout
check file syslog with path /var/log/syslog if size > 50 MB then alert
check filesystem "sda1" with path /dev/sda1 if space usage > 95% for 10 cycles then alert
That’s it. You have successfully installed and configured Monit on your Ubuntu 16.04 VPS. For more information about Monit, please refer to the official Monit documentation.
Of course, you don’t have to do any of this if you use one of our Linux VPS Hosting services, in which case you can simply ask our expert Linux admins to setup this for you. They are available 24×7 and will take care of your request immediately.
PS. If you liked this post please share it with your friends on the social networks using the buttons on the left or simply leave a reply below. Thanks.