The chmod operation allows the file owner to run a shell script. Note that “777” is too permissive for most environments. Finally, when you run an Linux shell script in an Ubuntu terminal window, you ...

It isn’t an uncommon scenario. The obvious answer is to create an archive — a zip or tar file, maybe — and include a shell script that you have to tell the user to run after unpacking.

cat: Hack: No such file or directory cat: A: No such file or directory cat: Day.txt: No such file or directory The $1 expands to three words: Hack, A, and Day.txt. For echo, that’s not a problem.

SSH known hosts store server fingerprints to prevent security risks. Learn how to use SSH known host commands to manage entries on Linux systems.