SYSTEMD-JOURNALCTL(1)						systemd-journalctl					     SYSTEMD-JOURNALCTL(1)

NAME

       systemd-journalctl - Query the systemd journal

SYNOPSIS

       systemd-journalctl [OPTIONS...] [MATCH]

DESCRIPTION

       systemd-journalctl may be used to query the contents of the systemd(1) journal.

       If called without parameter will show the full contents of the journal, starting with the oldest entry collected.

       If a match argument is passed the output is filtered accordingly. A match is in the format FIELD=VALUE, e.g.  _SYSTEMD_UNIT=httpd.service.

       Output is interleaved from all accessible journal files, whether they are rotated or currently being written, and regardless whether they
       belong to the system itself or are accessible user journals.

       All users are granted access to their private per-user journals. However, by default only root and users who are members of the adm group
       get access to the system journal and the journals of other users.

OPTIONS

       The following options are understood:

       --help, -h
	   Prints a short help text and exits.

       --version
	   Prints a short version string and exits.

       --no-pager
	   Do not pipe output into a pager.

       --all, -a
	   Show all fields in full, even if they include unprintable characters or are very long.

       --follow, -f
	   Show only most recent journal entries, and continously print new entries as they are appended to the journal.

       --lines=, -n
	   Controls the number of journal lines to show, counting from the most recent ones. Takes a positive integer argument. In follow mode
	   defaults to 10, otherwise is unset thus not limiting how many lines are shown.

       --no-tail
	   Show all stored output lines, even in follow mode. Undoes the effect of --lines=.

       --output=, -o
	   Controls the formatting of the journal entries that are shown. Takes one of short, short-monotonic, verbose, export, json, cat.  short
	   is the default and generates an output that is mostly identical to the formatting of classic syslog log files, showing one line per
	   journal entry.  short-monotonic is very similar but shows monotonic timestamps instead of wallclock timestamps.  verbose shows the full
	   structered entry items with all fiels.  export serializes the journal into a binary (but mostly text-based) stream suitable for backups
	   and network transfer.  json formats entries as JSON data structures.  cat generates a very terse output only showing the actual message
	   of each journal entry with no meta data, not even a timestamp.

       --quiet, -q
	   Suppresses any warning message regarding inaccessable system journals when run as normal user.

       --new-id128
	   Instead of showing journal contents generate a new 128 bit ID suitable for identifying messages. This is intended for usage by
	   developers who need a new identifier for a new message they introduce and want to make recognizable. Will print the new ID in three
	   different formats which can be copied into source code or similar.

EXIT STATUS

       On success 0 is returned, a non-zero failure code otherwise.

ENVIRONMENT

       $SYSTEMD_PAGER
	   Pager to use when --no-pager is not given; overrides $PAGER. Setting this to an empty string or the value cat is equivalent to passing
	   --no-pager.

SEE ALSO

       systemd(1), systemctl(1), systemd-journald.conf(5)

AUTHOR

       Lennart Poettering <lennart@poettering.net>
	   Developer

systemd 							    10/07/2013						     SYSTEMD-JOURNALCTL(1)