Ubuntu – Find and replace text within a file using commands

command linetext processing

How can I find and replace specific words in a text file using command line?

Best Answer

  • sed -i 's/original/new/g' file.txt
    

    Explanation:

    • sed = Stream EDitor
    • -i = in-place (i.e. save back to the original file)
    • The command string:

      • s = the substitute command
      • original = a regular expression describing the word to replace (or just the word itself)
      • new = the text to replace it with
      • g = global (i.e. replace all and not just the first occurrence)
    • file.txt = the file name

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