logger —
make entries in the system log
  
    | logger | [ -cins] [-dSD] [-ffile] [-mmsgid] [-ppri] [-ttag] [message ...] | 
logger provides a shell command interface to the
  syslog(3) system log module.
Options:
  - -c
- Log to console (LOG_CONS).
- -dsd
- Log this in the structured data (SD) field. (sd has
      to be passed as one argument and will require careful quoting when used
      from the shell.)
- -ffile
- Log the specified file.
- -i
- Log the process id of the logger process with each line
      (LOG_PID).
- -mmsgid
- The MSGID used for the message.
- -n
- Open log file immediately (LOG_NDELAY).
- -ppri
- 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
      (LOG_PERROR).
- -ttag
- Mark every line in the log with the specified
    tag.
- message
- Write the message to log; if not specified, and the
      -fflag is not provided, standard input is
    logged.
Thelogger 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 conforms to IEEE Std
  1003.2-1992 (“POSIX.2”).