List the names and values of all environment variables or, with name, the value of the environment variable name.
Syntax printenv [name] Options name The name of the environment variable
“Everything you read in newspapers is absolutely true, except for that rare story of which you happen to have first-hand knowledge” ~ Erwin Knoll
printenv page - Apple.com
env - Display, set, or remove environment variables
set - Manipulate shell variables and functions