> But you can use the '>' operator, that will create the file only if the command runs successful: It will still create the file. Run this in bash, zsh or fis

> But you can use the '>' operator, that will create the file only if the command runs successful: It will still create the file. Run this in bash, zsh or fish: false > falsefile It will create an empty file called "falsefile". This is because the shell opens the file before the program runs. What fixes it in your script is the `&&`. That causes the `dosctr` to only be run if the `dos-make-addr-conf` succeeded.