I'd like to watch the progress of a command that I know will take about six hours. I ran an update script and forgot to use -v (or whatever I should have done to watch the progress) so I have no way of knowing how far along the process is. In case it applies, the command I used was:drush cvupdbTo upgrade a CiviCRM installation, but this question doesn't really apply to CiviCRM specifically. The answer can apply universally to any already running process. I would have added this question as a comment to very similar posts but I don't have enough reputation yet so I needed to start a fresh topic. Thanks!
How can I apply -v after I have already executed a command?
upgrade;updatedb;progress information
Short answer: you can't do this in general.For your specific problem , to check to see if it's doing something, use top. Just run the top command and the processes using the most CPU will show up on top. If it's working, drush should probably be near the top.