Find a match on a line, delete that line and the line before that

Question

I have a file with text as below,

ukncsavix302:  
Red Hat Enterprise Linux Server release 6.6 (Santiago)  
ukncsavix353:  
Red Hat Enterprise Linux Server release 6.5 (Santiago)  
uknwsavix354:  
Red Hat Enterprise Linux Server release 6.5 (Santiago)

Now I need to find the lines with "6.5" on it, delete that line and delete one line above it.

Can someone help me break this?

Who on earth has upvoted this. Try the search function... – 123 Feb 18 '16 at 16:03 — 123, Feb 18 '16 at 16:03

score 2 · Answer 1 · answered Feb 18 '16 at 16:13

2

Try this:

tac file.txt | sed -e '/6.5/,+1d' | tac

Output to new file if needed:

tac file.txt | sed -e '/6.5/,+1d' | tac > newfile.txt

answered Feb 18 '16 at 16:13

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Find a match on a line, delete that line and the line before that

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