How to configure monit (a daemon monitoring tool) for debian

Monit is a very simple tool for monitoring daemons or processes in linux.

#First of all, install the monit using apt-get:
user@yourhost:~# apt-get install monit

#Edit the configuration file:
user@yourhost:~# nano /etc/monit/monitrc

#####
#add to the end of file the following:

set httpd port 2812 and
    use address localhost
    allow localhost

check process test_daemon with pidfile /var/test_daemon.pid
start program = "/etc/init.d/test_daemon start" with timeout 60 seconds
stop program = "/etc/init.d/test_daemon stop"



#to check the monit status, type:
user@yourhost:~# monit status 

The Monit daemon 5.4 uptime: 4m

Process 'test_daemon'
  status                            Running
  monitoring status                 Monitored
  pid                               31233
  parent pid                        1
  uptime                            6m
  children                          0
  memory kilobytes                  6700
  memory kilobytes total            6700
  memory percent                    0.6%
  memory percent total              0.6%
  cpu percent                       0.0%
  cpu percent total                 0.0%
  data collected                    Thu, 12 Nov 2015 06:59:23

System 'system_yourhost'
  status                            Running
  monitoring status                 Monitored
  load average                      [0.00] [0.01] [0.05]
  cpu                               0.5%us 0.2%sy 0.1%wa
  memory usage                      311036 kB [2.2%]
  swap usage                        0 kB [0.0%]

  data collected                    Thu, 12 Nov 2015 06:59:23


Monit is configured. Daemon is monitored. That's all!