update system configuration files
is a utility designed to help the
administrator update configuration files after upgrading to a new release or
works by comparing a reference root
directory against currently installed files.
will work through the fileset,
offering the chance to merge any differences using
. Merged files may be
edited using the default editor or be left to deal with at a later date.
Should any problems occur, such as a failure to upgrade a file, the user will
be notified and will have to deal with the issue by hand.
By default (if
is not used)
only compares files whose
reference sources have changed since the last run and attempts to
automatically upgrade them to the newest version, provided that they have no
local changes. It automatically installs missing files and binaries, and
updates files differing only by CVS Id. Files whose reference sources have
matching CVS Id are skipped from comparison.
are created using helper scripts
and are always
compared. Users and groups that
are missing from the current installation but present in the new
be automatically (re)created.
will finish by running
to make sure the
directory structure has correct permissions.
The options are as follows:
- Batch mode.
non-interactively, saving differing files for later manual
- Diff mode.
sysmerge does not take any
automatic action, allowing for a full diff comparison.
- Package mode.
sysmerge only compares
the default configuration files of installed
packages(7) against their
target on the system (@sample).
Files can be excluded from comparison by listing them in
. Checksum files stored
as well as the
following files will always be skipped from direct comparison:
- Specifies an editor to use. If both
VISUAL are set,
VISUAL takes precedence. If neither
VISUAL are set, the default is
- Specifies the pagination program to use. If
PAGER is empty or not set,
more(1) will be used.
- Files and directories to ignore from comparison.
- Directory containing backup of
last run modified files. Rotated automatically in order of increasing age
from backups.0 to
- Base system set containing the reference files corresponding to the
currently installed release.
- X(7) set containing the reference
files corresponding to the currently installed release.
script first appeared in
was written by
It was originally started as a friendly fork from mergemaster by