NAME

logger — make entries in the system log

SYNOPSIS

logger [-cis] [-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:

-c: If unable to pass the message to syslogd(8), attempt to write the message to the console.
-f file: Read from the specified file.
-i: Log the process ID of the logger process with each line.
-p pri: 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”.
-s: Log the message to standard error, as well as the system log.
-t tag: Mark every line in the log with the specified tag.
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.

$ logger System rebooted

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

The logger utility is compliant with the IEEE Std 1003.1-2008 (“POSIX.1”) specification.

The flags [-cfipst] are extensions to that specification.