That is a variation of the grep exercise. Check this thread for further examples. (The main difference between your task and the other one is negation of printing sense. Btw, the grep -v option only negates matching sense and so grep -v -A1 -B1 can not be used for your purposes.)

In reply to Re: how to check for a word in a file and if found remove that line, the above line and the below line from the file. by oiskuu
in thread how to check for a word in a file and if found remove that line, the above line and the below line from the file. by Ganesh Bharadwaj1

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