I want to keep track of how long a task is running. Thinking it wouldn't take that long, I opted not to run time before it. The fact that it is taking a long time, if I revisit the machine in the morning, what would be the best way to find out what time it ended? In this case, I'm using mt to erase an lto3 tape - sudo mt -f /dev/st0 erase. But I'd like to use the knowledge from this question to track other events, too. I feel like I should know this answer, but cannot think of the solution at the moment. Thanks. Scott