The logger utility provides a method for adding one-line entries to the system log file from the command line. One or more message arguments can be given on the command line, in which case each is logged immediately. If message is unspecified, either the file indicated with -f or the standard input is added to the log. Otherwise, a filename can be specified, in which case each line in the file is logged. If neither is specified, logger reads and logs messages on a line-by-line basis from the standard input.

The following options are supported:

-i

Log the process ID of the logger process with each line.

-f filename

Use the contents of filename as the message to log.

-p priority

Enter the message with the specified priority. The message priority can be specified numerically, or as a facility.level pair. For example, `-p local3.info' assigns the message priority to the info level in the local3 facility. The default priority is user.notice.

-t tag

Mark each line added to the log with the specified tag.

See attributes(5) for descriptions of the following attributes:

syslogd(1M), syslog(3C), attributes(5)