How to check if another instance of my shell script is running

Question

GNU bash, version 1.14.7(1)

I have a script is called \"abc.sh\" I have to check this from abc.sh script only... inside it I have written f

Answer 1

[ "$(pidof -x $(basename $0))" != $$ ] && exit

https://github.com/x-zhao/exit-if-bash-script-already-running/blob/master/script.sh