Praveen Singh         No comments

All logs are stored in /var/log directory under Ubuntu (and other Linux distro).

=> /var/log/messages          General log messages
=> /var/log/boot                 System boot log
=> /var/log/debug               Debugging log messages
=> /var/log/auth.log            User login and authentication logs
=> /var/log/daemon.log       Running services such as squid, ntpd
=> /var/log/dmesg               Linux kernel ring buffer log
=> /var/log/dpkg.log            All binary package log includes package installation 
=> /var/log/faillog               User failed login log file
=> /var/log/kern.log            Kernel log file
=> /var/log/lpr.log               Printer log file
=> /var/log/mail.*                All mail server message log files
=> /var/log/mysql.*             MySQL server log file
=> /var/log/user.log            All userlevel logs
=> /var/log/xorg.0.log log file
=> /var/log/apache2/*         Apache web server log files directory
=> /var/log/lighttpd/*          Lighttpd web server log files directory
=> /var/log/fsck/*               fsck command log
=> /var/log/apport.log         Application crash report / log file

To view log files at shell prompt

tail -f /var/log/apport.log
more /var/log/xorg.0.log
cat /var/log/mysql.err
less /var/log/messages
grep -i fail /var/log/boot

[View log files using GUI tools using the GNOME System Log Viewer]

  • System Log Viewer is a graphical, menu-driven viewer that you can use to view and monitor your system logs. System Log Viewer comes with a few functions that can help you manage your logs, including a calendar, log monitor and log statistics display. System Log Viewer is useful if you are new to system administration because it provides an easier, more user-friendly display of your logs than a text display of the log file. It is also useful for more experienced administrators, as it contains a calendar to help you locate trends and track problems, as well as a monitor to enable you to continuously monitor crucial logs.  

    There are some methods to start the log viewer--

     Click on System menu > Choose Administration > System Log:

    you can start the GNOME System Log Viewer from a shell prompt, by entering the following command:

    $ gnome-system-log &


Published by Praveen Singh

A blogger by passion.You can find me tucked in my bed and blogging on weekends when not roaming around. Besides blogging, I love music and you can find my songs on my fb page:PraveenUnplugged
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