Linux · Flashcard
Which command makes a shell variable available to programs started from that shell?
- Aexport, which marks the variable for inheritance by children
- Bdeclare -i, which makes the variable hold integers only
- Creadonly, which forbids any later change to the variable
- Dunset, which deletes the variable from the current shell
Why this is the answer
export moves the variable into the environment, which is the copy every child process inherits — a variable that is only set stays private to this shell. declare -i and readonly change how the variable behaves here, and unset removes it entirely.
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