I have a job launched in a screen session which is expected to run for several hours. From time to time I'm requested to check if job is still running and guess at wich % of work is.
Guess if it is working or not is as simple as perform a
ps -fu $LOGNAMEto check if the process is still alive, but in order to guess the % I need to check the output of the program (it outputs some information which can be used with
grep -n to see which line of file it is currently processing).
I can attach the session (
screen -R jobLoadItems) and take a look to it, but I would like to do it without attaching to session again. I already checked to perform inside the screen session Ctrla-H to activate screenlog but it's so verbooooooooose it will take all disk space available.
So there is a way to just print last lines of the screen session without attaching to it? (something like
screen -S jobLoadItem -Q display last 50 lines)