make entries in the system log (POSIX)
Syntax:
logger [-is] [-f file] [-p pri] [-t tag] [message ...]
Options:
- -i
- Log the process id of the logger process with each line.
- -s
- 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.
- message
- Write the message to log; if not specified, and the -f flag is
not provided, standard input is logged.
Examples:
Log the message "System rebooted":
logger System rebooted
Log the file /tmp/log tagging each line with log:
logger -f /tmp/log -t log
Description:
The logger command provides a shell command interface to the syslogd daemon.
Exit status:
- 0
- Successful completion.
- >0
- An error occurred.
Because the syslog API does not return error codes, only argument
errors can be detected.
Environment variables:
- SYSLOG
- When defined, SYSLOG specifies which node syslogd is running on.
By default, the local node is assumed.
See also:
- syslog() C function
- syslogd manager (System message logger)