Author Topic: Logs in Ubuntu server and how to view them  (Read 45331 times)

Svein Wisnaes

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Logs in Ubuntu server and how to view them
« on: July 19, 2010, 04:42:03 am »
Information about the main eBox log is included in "How to make a good post".

There are a lot of additional logs available on your eBox that can help when you search for the solution to a problem. You will find most of the logs under /var/log and here is a list of some of the logs:

=> /var/log/syslog : General system log

=> /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 and others log message to this file

=> /var/log/dmesg : Linux kernel ring buffer log

=> /var/log/dpkg.log : All binary package log includes package installation and other information

=> /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/squid/*.log : HTTP proxy logs

=> /var/log/dansguardian/*.log : HTTP proxy's content filter logs

To view these logs from the command line, you can use the tail, more, less and grep commands.

Code: [Select]
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


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