Install Logwatch in Linux CentOS

Logwatch is a Linux application that parses log files, analyses them and sends periodical reports, based on specific criteria, to one or more email addresses.
In order to install logwatch in linux CentOS you have to issues the following command:

yum install logwatch

Edit the configuration file:

nano /usr/share/logwatch/default.conf/logwatch.conf

Check and edit the following directives in order to suit your needs:

LogDir = /var/log
MailFrom = Logwatch@mydomain.com
Range = yesterday //(or today)
Detail=Medium // (other: Low, Medium, High)
Service=all //(other examples would be httpd, sshd2, ftp)

Run logwatch manually:

logwatch --detail High --mailto myemail@domain.com --service http --range today

The output should be like this:

 ################### Logwatch 7.3.6 (05/19/07) ####################
        Processing Initiated: Tue May 19 14:21:59 2015
        Date Range Processed: today
                              ( 2015-May-19 )
                              Period is day.
      Detail Level of Output: 5
              Type of Output: unformatted
           Logfiles for Host: nix
  ##################################################################

 --------------------- courier mail services Begin ------------------------

 **Unmatched Entries**
   courier-pop3d - 2 Times
      Connection, ip=[::ffff:182.118.53.150] - 1 Time
      Disconnected, ip=[::ffff:182.118.53.150] - 1 Time



 ---------------------- courier mail services End -------------------------


 --------------------- Cron Begin ------------------------

sshd:
    Authentication Failures:
       root (43.255.188.163): 4930 Time(s)
       root (43.255.188.155): 3524 Time(s)
       root (61-218-247-185.hinet-ip.hinet.net): 925 Time(s)
       unknown (61-218-247-185.hinet-ip.hinet.net): 391 Time(s)
       root (61.133.63.14): 137 Time(s)
       root (58.218.205.72): 114 Time(s)
       root (222.186.160.48): 98 Time(s)
       root (218.65.30.61): 90 Time(s)
       root (221.229.166.81): 80 Time(s)
       root (58.218.205.66): 69 Time(s)
       root (58.218.199.195): 68 Time(s)