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I have a file which has 7375 lines and i need to add ls -l to the beginning of every line. How could i do this with sed?

marked as duplicate by Stéphane Chazelas sed Aug 11 '17 at 13:39

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    sed '/^/ls -l /' my_file ? – Stephen Rauch Aug 11 '17 at 13:16
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Search for the beginning of a line with ^ and replace it with your desired string ls -l with sed's s/search/replace/

Your command would look like:

$ sed 's/^/ls -l /' file

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