How do i check the exit code after running a shell script?

vaquitasos

Exit codes show if a script or program ran successfully. If the exit code is zero, it was successful, anything else is not successful.

To check the exit code immediately after running a shell script do the following:

$ ./myscript 
My fruit is pineapple
$ echo $?
0

The "$?" is a special shell variable to show the exit code.

The exit code can also be seen using commands on the shell prompt. When you introduce a typo and check the exit code, you see 127

$ whoami
trainer
$ echo $?
0
$ whoam
No command 'whoam' found, did you mean:
 Command 'whom' from package 'mailutils-mh' (universe)
 Command 'whom' from package 'nmh' (universe)
 Command 'whoami' from package 'coreutils' (main)
whoam: command not found
$ echo $?
127