I can use a program like top to periodically update system statistics and I can use lsof -p <pid> | wc -l to give me a snapshot of the number open files for a process. Is there a command I can call that, like top, will periodically show me the number of open files for a process, updated every second or so?


Check out watch, if all you need is to call a command like lsof -p <pid> | wc -l periodically.



Or just write a simple bash script that repeats a command periodically.

while true
  lsof -p <pid> | wc -l
  sleep 2
| improve this answer | |
  • Thanks. However, watch does not appear to be available on Mac OS X. – ericg Sep 21 '11 at 10:06
  • You can download and compile watch yourself, but I guess it's quicker to write a bash script :) – Jin Sep 21 '11 at 11:14

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