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Bash exscript to replace word occurrences

/ Published in: Bash
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As portrayed by the example found in the [Advanced Bash Scripting guide](http://tldp.org/LDP/abs/html/here-docs.html) this demonstrates a few techniques

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  1. #!/usr/bin/env bash
  2. #  Replace all instances of "Smith" with "Jones"
  3. #+ in files with a ".txt" filename suffix. 
  4.  
  5. ORIGINAL=Smith
  6. REPLACEMENT=Jones
  7.  
  8. for word in $(fgrep -l $ORIGINAL *.txt)
  9. do
  10.   # -------------------------------------
  11.   ex $word <<EOF
  12.   :%s/$ORIGINAL/$REPLACEMENT/g
  13.   :wq
  14. EOF
  15.   # :%s is the "ex" substitution command.
  16.   # :wq is write-and-quit.
  17.   # -------------------------------------
  18. done

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