Issue
I get similar results running "env" and "set". Set gives more results - is it a superset of env?
The man page for set doesn't give any information. How do these commands work and what's the difference?
Solution
Long story short: set can see shell-local variables, env cannot.
Shells can have variables of 2 types: locals, which are only accessible from the current shell, and (exported) environment variables, which are passed on to every executed program.
Since set is a built-in shell command, it also sees shell-local variables (including shell functions). env on the other hand is an independent executable; it only sees the variables that the shell passes to it, or environment variables.
When you type a line like a=1 then a local variable is created (unless it already existed in the environment). Environment variables are created with export a=1
Answered By - intgr Answer Checked By - Terry (WPSolving Volunteer)