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- 123
- 456
- 789
- 456
- 123456
- $ sed -i '/123/d' dummy.sh
- $ vi dumm.txt
- 456
- 789
- 456
- $ sed -i 's/123//g' dummy.sh
- $ vi dumm.txt
- 456
- 789
- 456
- 456
- sed -i '/^123$/d' dummy.sh #delete whole line
- sed -i 's/^123$//' dummy.sh #replace with empty line
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