How do you suffix the end of a bash file?

Question

I know this is probably me being dumb, but here's what I'm confused on:

1. What are the suffixes called at the end of a file? ie. .txt, .php, .html, etc

2. What suffix does a bash file use? .bash?

Thanks for helping my stupidity to be no more.

Answer 1

These are called file extensions. By convention, shell scripts including Bash scripts get a .sh extension (for "SHell script").

Note that this is not a requirement for the script to execute. You can leave it off, or give it a different file extension (such as .bashrc for example, for the default Bash initialization script) and it will still run all the same.