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How to remove readonly variable?

Hi,

# var1=super
# var1=

1.first i assign var1=super, than i assign var1 to nothing.

# var1=super
# readonly var1
# var1=
-bash: var1: readonly variable
# unset var1
-bash: unset: var1: cannot unset: readonly variable

2. Now i assign var1 as readonly variable, than if i really want to change or remove this variable how to do?

Thank.

Quote:

Originally Posted by hocheetiong (Post 3128214)

2. Now i assign var1 as readonly variable, than if i really want to change or remove this variable how to do?

Don't declare it as readonly. Once you've set a variable as readonly you can't do anything but kill the shell.

The only chance is to use readonly variables in a subshell. In this case the variable is local to the subshell and the parent shell is not aware of its existence:

Code:

( var=3; readonly var; echo $var )

var=5

echo $var