Inspecting the Opal server and DataSHIELD logs

Viewing the logs

If you wish to look at the Opal server or DataSHIELD logs:

• Login into the Opal server using the console window for the Virtual Machine
• Change to directory"/var/log/opal" 

  cd /var/log/opal

• List the contents using:

   ls -lt

  (the "-lt" command instructs it to list in order of most recent change

• The directory contains four log files:  
  • datashield.log
  • opal.log
  • rest.log
  • stdout.log

Monitoring Logging

If you wish to create a blank slate to view what logs are created as you try to recreate a problem on the opal server, you can clear out the logs using the following steps.

Firstly, delete anything with a hyphen in the file name:

Then map blank contents into the four remaining files (effectively the same as deleting the contents of them.

The command  

tail -n 0 -f

is useful for monitoring logging, for example, "tail -n 0 -f stdlog.log".