How to clear all bash variables?

Question

I like to make command-line bash variables for testing or for other purposes. I give them generic names like a, b, var1... Sometimes I may forget which variables I've already used. Anyway, is there a single command to clear all bash variables? Now after running such a command, I want all bash variables that were defined by the user to become undefined. When echo $undefinedvariable is run, the result is a blank line. All built-in variables like $USER or $SHELL should remain untouched by this command.

score 6 · Accepted Answer · edited Jan 04 '17 at 07:22

6

Use the bellow command

 $ exec bash

It will clear all bash variable

edited Jan 04 '17 at 07:22

AReddy

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answered Jan 04 '17 at 06:49

Rakib

2,435

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But not exported ones. – Kusalananda Jan 04 '17 at 07:55

How to clear all bash variables?

1 Answers1