I remember the first time someone told me there was a difference between single and double quotes in Bash. They couldn't remember what the difference was. "Single is a string literal and double is something else".
https://stackoverflow.com/questions/6697753/difference-between-single-and-double-quotes-in-bash
https://stackoverflow.com/questions/6697753/difference-between-single-and-double-quotes-in-bash


