A logic flaw between Ubuntu's 'command-not-found' package suggestion system and the snap package repository could enable attackers to promote malicious Linux packages to unsuspecting users.

It's not hard to create and run a shell script in Linux distros like Ubuntu, but there are a few non-obvious pitfalls you need to avoid. Here's a quick example of how to execute a script in Linux.

To get a list of the bash builtins, just type “help” when you’re on the bash command line. For more about built-ins, refer to “ How to tell if you’re using a bash builtin ”.