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30 Handy Bash Shell Aliases For Linux / Unix / Mac OS X

I'm a bash shell user. I would like to temporarily clear bash shell environment variables. I do not want to delete or unset an exported environment variable. How do I run a program in a temporary environment in bash or ksh shell?

Little Button by penguinsfan90 on deviantART

Little Button by penguinsfan90 on deviantART