Bash question

[Gaziz]

It used to be a parameter to warn about the un-initialized variable but cannot find it again, please help. What is that param?

What I want:

user@machine>cat my_script.sh
#/bin/bash -some_option

echo $NEVER_USED_VAR

user@machine>./my_script.sh
bah, bash warning: $NEVER_USED_VAR - unbound variable

[Nick]

set -u

[Gaziz]

точно, спасибо!