Remove variable or function names
Syntax unset [-fv] [name] Options -f The names refer to shell Functions, and the function definition is removed. Readonly variables and functions may not be unset. -v Each name refers to a shell Variable (default)
The return status is zero unless a name does not exist or is readonly.
unset is a bash built in command.
"A good trader has to have three things: a chronic inability to accept things at face value, to feel continuously unsettled, and to have humility" ~ Michael Steinhardt
env - Display, set, or remove environment variables
echo - Display message on screen
export - Set an environment variable
function - Define Function Macros
readonly - Mark variables/functions as readonly
set - Manipulate shell variables and functions
Equivalent Windows commands: SET - Display, set, or remove Windows environment variables