logger − a shell command interface to the syslog(3) system log module
logger [options] [message]
logger makes entries in the system log. It provides a shell command interface to the syslog(3) system log module.
−n, −−server server
Write to the specified remote syslog server instead of to the builtin syslog routines. Unless −−udp or −−tcp is specified the logger 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:
Valid level names are:
For the priority order and intended purposes of these facilities and levels, see syslog(3).
logger System
rebooted
logger −p local0.notice −t HOSTIDM −f
/dev/idmc
logger −n loghost.example.com System rebooted
syslog(3), syslogd(8)
The logger command is expected to be IEEE Std 1003.2 ("POSIX.2") compatible.
The logger command is part of the util-linux package and is available from Linux Kernel Archive.