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| | The /var contains data that is changed when the system is
running normally. It is specific for each system, i.e., not
shared over the network with other computers.
- /var/catman
A cache for man pages that are formatted
on demand. The source for manual pages is usually
stored in /usr/man/man*; some
manual pages might come with a pre-formatted version,
which is stored in /usr/man/cat*.
Other manual pages need to be formatted when they are
first viewed; the formatted version is then stored
in /var/man so that the next
person to view the same page won't have to wait for
it to be formatted. (/var/catman
is often cleaned in the same way temporary directories
are cleaned.) - /var/lib
Files that change while the system is
running normally. - /var/local
Variable data for programs that are
installed in /usr/local (i.e.,
programs that have been installed by the system
administrator). Note that even locally installed
programs should use the other /var
directories if they are appropriate, e.g.,
/var/lock. - /var/lock
Lock files. Many programs
follow a convention to create a lock file in
/var/lock to indicate that they
are using a particular device or file. Other programs
will notice the lock file and won't attempt to use the
device or file. - /var/log
Log files from various
programs, especially login
(/var/log/wtmp, which logs all logins
and logouts into the system) and syslog
(/var/log/messages, where all
kernel and system program message are usually stored).
Files in /var/log can often grow
indefinitely, and may require cleaning at regular
intervals. - /var/run
Files that contain information about the
system that is valid until the system is next booted.
For example, /var/run/utmp
contains information about people currently logged
in. - /var/spool
Directories for mail,
news, printer queues, and other queued work.
Each different spool has its own subdirectory
below /var/spool,
e.g., the mailboxes of the users are in
/var/spool/mail. - /var/tmp
Temporary files that are large
or that need to exist for a longer time than
what is allowed for /tmp.
(Although the system administrator might not allow
very old files in /var/tmp
either.)
|