geth Fatal Error starting protocol stack datadir already used by another process

Question

When I run geth,  i get the following error. How to solve this?

geth
INFO [12-05|12:10:00.698] Maximum peer count                       ETH=25 LES=0 total=25
Fatal: Error starting protocol stack: datadir already used by another process

Answer 1

It seems like geth is already running. Find the process ID and kill that process. 

$ ps

   PID TTY          TIME CMD
 27957 pts/0    00:00:00 bash
 29453 pts/0    00:00:00 nano
 34395 pts/0    00:00:00 geth
 34436 pts/0    00:00:00 ps

$ kill -9 34395