The necessary input to the errupdate command can be in a file or from standard input. In the following example, standard input is used. Writing and Debugging Programs . The errlogger command allows the system administrator to record messages in the error log. Whenever you perform a maintenance activity, such as clearing entries from the error log, replacing hardware, or applying a software fix, it is a good idea to record this activity in the system error log.
Some applications use syslog for logging errors and other events.
Some administrators find it desirable to be able to list error log messages and syslog messages in a single report. This can be accomplished by redirecting the syslog messages to the error log. See the syslogd daemon for more information. You can log error log events in the syslog file by using the logger command with the concurrent error notification capabilities of error log.