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sed - search & replace with variables within bash

sed is extremely helpful in search & replace text, in file & variables. Often we need to construct a list of strings together with variables. But the normal usage of sed :e.g. sed -e ’s/text-to-search/string-to-replace-$variable-name/g’ will only replace the variable $variable-name literally rather then the pre-define value. After meddling with a few more stuff, the ...

 

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