Windows Command Line - Environment Variable

Display All system Variable

SET

Display A particular Variable

Echo %Variable_name%
or
set variable_name

Set A Variable

setx variable_name "Path"

Delete A variable

HKCU - Windows Registry tree that contains configuration data that is used by Current User /v is followed by variable name

REG delete HKCUEnvironment /F /V variable_name

相信未来 - 该面对的绝不逃避，该执著的永不怨悔，该舍弃的不再留念，该珍惜的好好把握。