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LOGGER(1) General Commands Manual LOGGER(1)

make entries in the system log

logger [
] [
-f file
] [
-p pri
] [
-t tag
] [
message ...

The logger utility provides a shell command interface to the syslog(3) system log module.
The options are as follows:
Read from the specified file.
Log the process ID of the logger process with each line.
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 “user.notice”.
Log the message to standard error, as well as the system log.
Mark every line in the log with the specified tag.
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 utility is compliant with the IEEE Std 1003.1-2008 (“POSIX.1”) specification.
The flags [
] are extensions to that specification.
June 5, 2013 OpenBSD-current