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ISBN : 978-2-7460-9712-4
EAN : 9782746097124
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CentOS 2.1AS



LOGGER(1) BSD General Commands Manual LOGGER(1)


logger — make entries in the system log


logger [−isd] [−f file] [−p pri] [−t tag] [−u socket] [message ...]


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



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


Log the message to standard error, as well as the system log.

−f file

Log the specified file.

−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.

−u sock

Write to socket as specified with socket instead of builtin syslog routines.


Use a datagram instead of a stream connection to this socket.


End the argument list. This is to allow the message to start with a hyphen (−).


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.

Valid facility names are: auth, authpriv (for security information of a sensitive nature), cron, daemon, ftp, kern, lpr, mail, news, security (deprecated synonym for auth), syslog, user, uucp, and local0 to local7, inclusive.

Valid level names are: alert, crit, debug, emerg, err, error (deprecated synonym for err), info, notice, panic (deprecated synonym for emerg), warning, warn (deprecated synonym for warning).


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.

4.3 Berkeley Distribution June 6, 1993 4.3 Berkeley Distribution