Check if a process is running using Bash

Question

I am trying to check if a process is running with the code below:

SERVICE=\"./yowsup/yowsup-cli\"
RESULT=`ps aux | grep $SERVICE`

if [ \"${RESULT:-null}\" =         


        

Answer 1

Use pgrep:

if pgrep "$SERVICE" >/dev/null 2>&1 ; then
    echo "$SERVICE is running"
fi

or, more reliable:

if pgrep -f "/path/to/$SERVICE" >/dev/null 2>&1 ; then
    echo "$SERVICE is running"
fi