FileExists returns true if the file at path exists.

ReplaceOrAddEnv changes the value of an environment variable if it exists otherwise add the new variable It drops the existing value and appends the new value in-place.

RunPrivileged executes a command using sudo provide a reason why root is needed as the first argument.

CodeExitError is an implementation of ExitError consisting of an error object and an exit code (the upper bits of os.exec.ExitStatus).

ExitError is an interface that presents an API similar to os.ProcessState, which is what ExitError from os/exec is.