Window managers that
may have system-wide configuration files in these directories include Twm (twm).
Some files and directories in /etc/X11 are linked to locations in the /usr/X11R6
directory.
Administrative Log Files
One of the things that Linux does well is keep track of itself. This is a good thing, when you consider
how much is going on in a complex operating system. Sometimes you are trying to get a new
facility to work and it fails without giving you the foggiest reason why. Other times you want to
monitor your system to see if people are trying to access your computer illegally. In any of those
cases, you can use log files to help track down the problem.
The main utilities for logging error and debugging messages for Linux are the syslogd and klogd daemons.
General system logging is done by syslogd. Logging that is specific to kernel activity is done by
klogd. Logging is done according to information in the /etc/syslog.conf file. Messages are typically
directed to log files that are usually in the /var/log directory. Here are a few common log files:
boot.log??”Contains boot messages about services as they start up.
messages??”Contains many general informational messages about the system.
secure??”Contains security-related messages, such as login activity.
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