cp -n source.txt destination.txt
: Use your phone’s built-in settings to block the number immediately to prevent future contact. cp t33n txt exclusive
Reviewers and fans (MOAs) have highlighted several specific aspects of these exclusive versions: cp -n source
cp -n source.txt ~/private/ chmod 600 ~/private/source.txt # rw------- (owner only) cp t33n txt exclusive
But most CTF shells allow free command composition, so the simpler three‑command approach above is preferred.