Spy on the Output of a Linux Process Using its PID

There may be instances whereby ps -aux has been used to see the PID of a running process and you would like to see its output.

This can be done using:

tail -f /proc/{pid}/fd/1

Remember: replace {pid} with the PID of the process. 1 = stdout, 2 = stderr.

Bonus: to see the command used to execute the process, cat /proc/11883/cmdline | tr '\000' ' 'select can be used.


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