Sometimes you might be curious to find out the environment variables and values of a running process.
This is easy to do with the ps command, by providing the PID of the process (say 9999):
$ ps eww 9999
The ps command on Linux relies heavily on the
/proc pseudo filesystem to gather almost all of its information on processes. So, as you might guess you can get the exact same environment that ps prints from
/proc. Just provide the PID, say 9999:
$ cat /proc/9999/environ
Tried with: Ubuntu 14.04