centos man page for logger

LOGGER(1)							   User Commands							 LOGGER(1)

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

SYNOPSIS
       logger [options] [message]

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

OPTIONS
       -n, --server server
	      Write  to the specified remote syslog server instead of to the builtin syslog routines.  Unless --udp or --tcp is specified the log-
	      ger will first try to use UDP, but if it fails a TCP connection is attempted.

       -d, --udp
	      Use datagram (UDP) only.	By default the connection is tried to syslog port defined in /etc/services, which is often 514.

       -T, --tcp
	      Use stream (TCP) only.  By default the connection is tried to syslog-conn port defined in /etc/services, which is often 601.

       -P, --port port
	      Use the specified port.

       -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.

       -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 informational 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), 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).

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") compatible.

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

util-linux							    April 2013								 LOGGER(1)