LOGGER(1) BSD General Commands Manual LOGGER(1)
logger -- a shell command interface to the syslog(3) system log module
logger [-isd] [-f file] [-p pri] [-t tag] [-u socket] [message ...]
Logger makes entries in the system log. It provides a shell command interface to the
syslog(3) system log module.
-i Log the process id of the logger process with each line.
-s Log the message to standard error, as well as the system log.
-f file Log the specified file.
-p pri Enter the message with the specified priority. The priority may be specified
numerically or as a ``facility.level'' pair. For example, ``-p local3.info'' logs
the message(s) as informational level in the local3 facility. The default is
-t tag Mark every line in the log with the specified tag.
-u sock Write to socket as specified with socket instead of builtin syslog routines.
-d Use a datagram instead of a stream connection to this socket.
-- End the argument list. This is to allow the message to start with a hyphen (-).
message Write the message to log; if not specified, and the -f flag is not provided, stan-
dard input is logged.
The logger utility exits 0 on success, and >0 if an error occurs.
Valid facility names are: auth, authpriv (for security information of a sensitive nature),
cron, daemon, ftp, kern, lpr, mail, news, security (deprecated synonym for auth), syslog,
user, uucp, and local0 to local7, inclusive.
Valid level names are): alert, crit, debug, emerg, err, error (deprecated synonym for err),
info, notice, panic (deprecated synonym for emerg), warning, warn (deprecated synonym for
warning). For the priority order and intended purposes of these levels, see syslog(3).
logger System rebooted
logger -p local0.notice -t HOSTIDM -f /dev/idmc
The logger command is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.
4.3 Berkeley Distribution June 6, 1993 4.3 Berkeley Distribution