Exist Status

Exit Status In Bash

• You can check the exit status with the exit status variable:

echo "My script's exit status is '$?'"

• $? is only required if you need to retrieve the exact status of the previous command. If you only need to test for success or failure (any non-zero status), just test the command directly. e.g.:

if cmd; then
...
fi

Documentation

• https://mywiki.wooledge.org/BashPitfalls