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Source Repository:Gentoo Portage Tree

Summary: a utility for monitoring and managing daemons or similar programs running on a Unix system.


Monit is a utility for managing and monitoring processes, programs, files, directories and filesystems on a UNIX system.



To install app-admin/monit:

#emerge monit


Config file of monit resides in /etc/monitrc. And there is a item to specify a config directory. Uncomment if needed.

/etc/monitrc: config dir
## It is possible to include additional configuration parts from other files or
## directories.
#  include /etc/monit.d/*


Users added to the monit or users group will be able to manipulate monit through the web interface.

#gpasswd -a $USER monit
#gpasswd -a $USER users
Warning: passwords can be streamed to monits web interface, disable it all together after it is setup
Important: for security purposes change this entry
allow admin:monit

Boot Services


Note: this is the preferred method to run monit
/etc/inittab: auto restart monit in case of failure
ca:12345:ctrlaltdel:/sbin/shutdown -r now

 # Run monit in standard runlevels
 mo:2345:respawn:/usr/bin/monit -Ic /etc/monitrc

# Used by /etc/init.d/xdm to control DM startup.

to start monit immediately after changing inittab

#telinit q


Note: prefer inittab method over rc services

To start the service at boot.

#rc-update add monit default

To start the service immediately.

#/etc/init.d/monit start

Monitoring Monit

This hourly cron script will check to make sure monit has not crashed. As this uses pgrep, make sure to not name it monit.

if ! pgrep monit >/dev/null;then
rc-service monit restart

Pidfile Check

Monit relies upon pid files. For daemons that do not create a pidfile: a work around is needed.


Auto Restart Mysql

/etc/monitrc: auto restart mysql
check process mysql with pidfile /var/run/mysqld/
    start program = "/bin/bash -c 'rc-service mysql start'"
    stop program  = "/bin/bash -c 'rc-service mysql stop'"

Web Interface

Navigate to http://localhost:2812/ & login using your edited configuration line or admin / monit if you have not changed it yet.