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2) Why are all environment variables represented in a fixed format regardless of the shell you use? 4) What is the significance of these Bash

2) Why are all environment variables represented in a fixed format regardless of the shell you use?

4) What is the significance of these Bash commands?

a. !50

b. !-2:p

c. !!

d. ^doc^bak

What are their equivalents in Korn?

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