Linux prevents shell scripts from repeating execution

Today, when deployed in Jenkins, because developers frequently submitted code, resulting in Jenkins shell script in that frequent deployment, in order to prevent such problems, a special search to prevent the recurrence of code. Here's a look at the code:
#!/bin/bash

Lock_name= "/tmp/my.lock"
if (Set-o noclobber echo "$$" > "$LOCK _name") 2>/dev/null;
Then
Trap ' rm-f ' $LOCK _name '; Exit $? ' INT TERM EXIT


### Start normal process

### Normal Process End


### removing lock
Rm-f $LOCK _name
Trap-int TERM EXIT
Else
echo "Failed to acquire Lockfile: $LOCK _name."
echo "Held by $ (cat $LOCK _name)"
Exit 1
Fi

echo "Done."
This ensures that My.lock can only be created by one process. Much more reliable than the touch.
A trap captures a variety of signals and then processes it:
INT is used to handle CTRL + C canceling script execution.
TERM is used to handle kill-term PID cases.
EXIT not clear
In addition, it is not valid for kill-9.