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Jul 23rd, 2017
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  1. 123
  2. 456
  3. 789
  4. 456
  5. 123456
  6.  
  7. $ sed -i '/123/d' dummy.sh
  8. $ vi dumm.txt
  9. 456
  10. 789
  11. 456
  12.  
  13. $ sed -i 's/123//g' dummy.sh
  14. $ vi dumm.txt
  15. 456
  16. 789
  17. 456
  18. 456
  19.  
  20. sed -i '/^123$/d' dummy.sh #delete whole line
  21. sed -i 's/^123$//' dummy.sh #replace with empty line
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