You want to know how to debug LiveUpdate running on SEP for Linux 14.3 RU1 or higher.
SEP for Linux 14.3 RU1+
LiveUpdate logging is saved by default to /opt/Symantec/sdcssagent/AMD/sef/Logs/lux.log
Extended lux debug logging can be enabled by the following:
3. Save and close the file
At this point you can either run LiveUpdate manually to generate the log or wait for LiveUpdate to run automatically.
The log can be viewed at /opt/Symantec/sdcssagent/AMD/sef/Logs/devlux.log.
You can disable the debug logging by deleting /opt/Symantec/sdcssagent/AMD/sef/config/lux.logging.conf.