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LOGGER(1) General Commands Manual (urm) LOGGER(1)


loggermake entries in the system log


logger [options ...] [message ...]


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


Use IPv4 to connect to hosts.
Use IPv6 to connect to hosts.
, --source ip
Set source IP address.
, --host host
Log to host instead of to the default /dev/log.
, --unix sock
Log to UNIX socket sock instead of /dev/log.
, --id [pid]
Log the process id of the logger process with each line.
, --stderr
Log the message to standard error, as well as the system log.
, --file file
Log the specified file.
, --priority pri
Enter the message with the specified priority. The priority may be specified numerically or as a "facility.level" pair. For example, "-p" logs the message(s) as informational level in the local3 facility. The default is "user.notice."
, --tag tag
Mark every line in the log with the specified tag.
Display a short usage message.
Display a help list.
Display program version.
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.


logger System rebooted

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


syslog(3), syslogd(8).


The logger command is expected to be IEEE Std 1003.2 (“POSIX.2”) compatible.

February 15, 2019 GNU Network Utilities