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POHow to replace all but last matching in a file using bash?
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8028319
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8028433
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4
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2011-11-06T16:08:41.160
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2011-11-08T16:04:59.347
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2011-11-07T18:14:51.437
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Assuming using bash, having a configuration file like: <blockquote> <ol> <li>param-a=aaaaaa</li> <li>param-b=bbbbbb</li> <li>param-foo=first occurence <-- Replace</li> <li>param-c=cccccc</li> <li># param-foo=first commented foo <-- Commented: don't replace</li> <li>param-d=dddddd</li> <li>param-e=eeeeee</li> <li>param-foo=second occurence <-- Rreplace</li> <li>param-foo=third occurence <-- Last active: don't replace</li> <li>param-x=xxxxxx1</li> <li>param-f=ffffff</li> <li># param-foo=second commented foo <-- Commented: don't replace</li> <li>param-x=xxxxxx2</li> </ol> </blockquote> In which you can find multiple commented or uncommented lines of the param-foo, how can you comment all the uncommented param-foos except the very last active one, resulting in: <blockquote> <ol> <li>param-a=aaaaaa</li> <li>param-b=bbbbbb</li> <li># param-foo=first occurence <-- Replaced</li> <li>param-c=cccccc</li> <li># param-foo=commented foo <-- Left</li> <li>param-d=dddddd</li> <li>param-e=eeeeee</li> <li># param-foo=second occurence <-- Replaced</li> <li>param-foo=third occurence <-- Left</li> <li>param-x=xxxxxx1</li> <li>param-f=ffffff</li> <li># param-foo=second commented foo <-- Left</li> <li>param-x=xxxxxx2</li> </ol> </blockquote> Two parts of the question: 1. How to do it with only one known repeating param? (only param-foo in the example above) 2. How to do it with all multiple active params at once? (param-foo + param-x in the example above) Attention: In this case I don't know previously the name of the repeating params! Thanks
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<bash><replace>
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How to replace all but last matching in a file using bash?
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1. USLuca Borrione
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1. COdo you always have spaces between # and the actual text?
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2. COI usually comment like this, but it can happen to another person to comment differently .. so the only sure thing is to have a commented line starting with #
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 POHow to replace all but last matching in a file using bash?
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