This application shows environment variables.
ITEMS
(1) The result of set command by general user.
(2) The result of env command by general user.
(3) The result of set command by super user.
(4) The result of env command by super user.
The 'busybox' is required at (2)(4).
The privilege as super user (root) is required at (3)(4).
If you click the radio button which has been checked already,
the same command is executed once more.
