monitor open process files on linux (real-time)

Question

The files opened by XYZ process can be found with the command

ls -l /proc/PID/fd

Is there anyway that can be done in a more interactive way like tail auto-refreshing every x seconds?

Thank you.

Answer 1

Try the watch command:

watch -n 10 ls -l /proc/$$/fd

Watch is nice.

You could use an old school while loop:

while :
do
 ls -l /proc/$$/fd
 sleep 10
done

watch is in the procps package on debian based systems and the procps rpm on RedHat derived systems.

Answer 2

You could combine lsofand watch.

For example watch "lsof -p 1234" will give you a list of all open files of pid 1234 every 2 seconds. You could change some parameters to meet your needs.