Monit

Monit is a very useful program because he is able to check the availability of your different services and restart them if they become unstable or inaccessible.

For this, Monit can:

• check if a service is started
• alert you by email when a problem occurs on your server
• alert you when a service becomes unstable and automatically restart it if you want
• check services individually or in groups
• check the availability of your website and if you want a specific page of your site
• Monit supports TCP and UDP protocols, and monitoring of them over SSL (eg HTTPS)
• check resources (CPU and RAM) used by Linux and your services
• check the stability of your Linux server
• and more.