To test a shell script called myscript, the environment variable FOOBAR must be removed temporarily.
How can this be done?
A.
unset -v FOOBAR
B.
set -a FOOBAR=""
C.
env -u FOOBAR myscript
D.
env -i FOOBAR myscript
Explanation:
From the man pages:
env – run a program in a modified environment
-u, –unset=NAME remove variable from the environment