logger — a shell command interface to the syslog(3) system log module

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LOGGER(1) User Commands LOGGER(1)

NAME
logger — a shell command interface to the syslog(3) system log module

SYNOPSIS
logger [-dhisV] [-f file] [-n server] [-P port] [-p pri] [-t tag]
[-u socket] [message]

DESCRIPTION
logger makes entries in the system log. It provides a shell command
interface to the syslog(3) system log module.

Options:

-d, --udp
Use datagram (UDP) instead of the default stream connection
(TCP).

-i, --id
Log the process ID of the logger process with each line.

-f, --file file
Log the contents of the specified file. This option cannot be
combined with a command-line message.

-h, --help
Display a help text and exit.

-n, --server server
Write to the specified remote syslog server using UDP instead of
to the builtin syslog routines.

-P, --port port
Use the specified UDP port. The default port number is 514.

-p, --priority priority
Enter the message into the log with the specified priority. The
priority may be specified numerically or as a facility.level
pair. For example, -p local3.info logs the message as informa‐
tional in the local3 facility. The default is user.notice.

-s, --stderr
Output the message to standard error as well as to the system
log.

-t, --tag tag
Mark every line to be logged with the specified tag.

-u, --socket socket
Write to the specified socket instead of to the builtin syslog
routines.

-V, --version
Display version information and exit.

-- 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, standard 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 (can't be generated from user
process), lpr, mail, news, security (deprecated synonym for auth), sys‐
log, 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).

EXAMPLES
logger System rebooted

logger -p local0.notice -t HOSTIDM -f /dev/idmc

logger -n loghost.example.com System rebooted

SEE ALSO
syslog(3), syslogd(8)

STANDARDS
The logger command is expected to be IEEE Std 1003.2 (“POSIX.2”) compati‐
ble.

AVAILABILITY
The logger command is part of the util-linux package and is available
from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

util-linux August 2011 util-linux