To enable Upstart logging output, you can modify the log stanza in the Upstart configuration file for the service that you want to log. The Upstart configuration files for services are typically stored in the /etc/init directory on a Linux system.
The log stanza specifies the location of the log file and the level of detail included in the log messages. To enable logging output, you can add a log stanza to the Upstart configuration file for the service, like this:
log
file /var/log/my-service.log
level debug
This will enable logging output for the service and store the log messages in the /var/log/my-service.log file. The level parameter specifies the level of detail included in the log messages. In this example, the debug level will include all log messages, including debug information.
You can also specify other options in the log stanza, such as the maximum size of the log file and the number of rotated log files to keep.
After modifying the Upstart configuration file, you will need to restart the service for the changes to take effect. You can use the initctl command to restart the service, like this:
initctl restart my-service
I hope this helps! Let me know if you have any other questions.
