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  • 15
    It gives me: 'cannot open /proc/<my pid>/fd/1 for reading: No such device or address'. Commented Oct 27, 2016 at 13:36
  • 35
    yeah <my pid> should be your process id Commented Nov 8, 2016 at 14:10
  • 75
    This won't work if the output is going to a tty (or redirected to /dev/null) — it will only work if the output is redirected to a file. Commented Apr 26, 2017 at 18:19
  • 3
    Tested on Ubuntu 16.04 and it doesn't work. In a session I do: ping google.es and in another one as root: tail -f /proc/`pgrep ping`/fd/2 and nothing is shown. Commented Mar 2, 2018 at 8:57
  • 18
    tail doesn't work for me, I am using sudo cat /proc/<pid>/fd/1 instead Commented Feb 11, 2019 at 8:39