check for hanging postgres process (postmaster.pid)

cat /usr/local/var/postgres/postmaster.pid
to kill, use `kill PID` Credit: user Craig Ringer on stackexchange.com, recommends to kill the process rather than deleting postmaster.pid when there is an orphan Postgresql server process.
Sample Output
42356
/usr/local/var/postgres
1485996870
5432
/tmp
localhost
  5432001    131072

0
By: ctcrnitv
2017-02-07 02:38:28

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