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Code Block

language	bash

sed -i.bak 's/coy/reindeer/' hey.txt
cmp -s hey.txt hey.pristine.txt && echo "sed did not work, your files are identical."

And if we want to be more fancy to make the cmp line more generic,

Code Block

language	bash

sed -i.bak 's/coy/reindeer/' hey.txt
cmp -s $_ hey.pristine.txt && echo "sed did not work, your files are identical."

Insert Multiple Lines from File with Match

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