UNIX, get environment variable

Question

I have a ridiculous question due to a ridiculous problem.

Normally if I want to get the contents of an environment variable in UNIX shell, I can do

Answer 1

Using ${!VAR_NAME} should be what you are looking for

> FOO=BAR123
> VAR_NAME=FOO
> echo ${VAR_NAME}
FOO
> echo ${!VAR_NAME}
BAR123