chmod
chmod — change who may read, write or run a file. It is one of the commands you type in a terminal, and everything below is produced by running it: the output, the error you get when it goes wrong, and a terminal you can type it into yourself.
What it prints
Run against a small demo project — the same one you get in the terminal below, so the output is what you will see, not an illustration of it.
$ chmod +x script.sh$ ./script.shhi
What it looks like when it goes wrong
The most common mistake with chmod, and the exact message you get. Recognising the wording is most of the fix.
$ chmod +x missing.shchmod: cannot access 'missing.sh': No such file or directory
Broken down, word by word
Other commands
Try it yourself
Same files as above. Nothing here can break, and nothing leaves your browser.
Written by Mikhail Kuzmitskii