Like when you send a .7z instead of a .zip or .rar to a friend or a teacher because that’s what your computer has installed and they’re like “Oh No, not one of those, now I have to install 7Zip” even though the same program that opens .rar also opens .7z I feel like people are way more annoyed when they receive a .7z
Imagine me sending tar.gz without second though.
It was first time they saw file with two extensions. They got scared and worried.
Are there any examples of multiple file extensions outside of compression and archiving?
It’s common when you “wrap” one file type inside another. Like .tar combines multiple files into one, then .gz compresses a single file.
You also see it with PGP (encryption).
Suppose I have a javascript file for a node server’s backend access named db.js
Suppose I write tests for those functions and name the test script file db.test.js
Suppose I tar and gzip that file (bear with me), now named db.test.js.tar.gz
Suppose I sign that file with PGP, now named db.test.js.tar.gz.pgp
Now suppose I want to hide that signed compressed tarball of a javascript tests file for my db functions, and to do so, I name it .db.test.js.tar.gz.pgp
Now I have a file that looks like it consists of nothing but extensions. I’m sure you could push it even further though, if you tried.
