LOGGER(1) General Commands Manual LOGGER(1) NAME logger – make entries in the system log SYNOPSIS logger [-is] [-f file] [-p pri] [-t tag] [message ...] DESCRIPTION The logger utility provides a shell command interface to the syslog(3) system log module. The following options are available: -i Log the process id of the logger process with each line. This flag is ignored and the process id is always logged. -s Log the message to standard error, as well as the system log. -f file Read the contents of the specified file into syslog. This option is ignored when a message is also specified. -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”. -t tag Mark every line in the log with the specified tag rather than the default of current login name. message Write the message to log; if not specified, and the -f flag is not provided, standard input is logged. EXIT STATUS The logger utility exits 0 on success, and >0 if an error occurs. EXAMPLES logger System rebooted logger -p local0.notice -t HOSTIDM -f /dev/idmc SEE ALSO syslog(3), syslogd(8) STANDARDS The logger command is expected to be IEEE Std 1003.2 (“POSIX.2”) compatible. macOS 15.2 March 16, 2022 macOS 15.2