where to set a if condition for a crontab job to execute
Want to know where can I set an if condition to check for a currently running process, if that process is running, then do not execute. Else, execute. Can I set that condition inside the script itself?
If the script is called my_script.sh, in the start of the script, check to see if a PID for this scheduled script is already running, if so...do not execute. ( I want the previous one to finish)
if [[ -z "$CHECK"]] then ; my_script.sh starts here