Famous Sed One-Liners Explained, Part II: Selective Printing of Certain Lines

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Tony Permalink
January 16, 2010, 16:25

Hi,

I'm very interested by the tips 52 et 53
I would like to know if it is possible, to subsitute something in the previous line or following line the line containing the patter. I don't know if it is possible

cat file

foo bar
the rate of gold very high
dollar usa currency
Our currency your problem
gold

I would like to transform it with one line sed script to

foo bar
PREVIOUS LINE PATTERN DOLLAR
dollar usa currency
FOLLOWING LINE PATTERN
gold

Thanks

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