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This is Section 5 of the sed FAQ. Go back to Section 4, or forward to Section 6. Go up to the index. 5. WHY ISN'T THIS WORKING? 5.1. Why don't my variables like $var get expanded in my sed script? Because your sed script uses 'single quotes' instead of "double quotes." Unix shells never expand $variables in single quotes. This is probably the most frequently-asked sed question. For more info on us