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I have a file that looks like this: 2011-03-21 name001 line1 2011-03-21 name002 line2 2011-03-21 name003 line3 2011-03-22 name002 line4 2011-03-22 name001 line5 for each name, I only want its last appearance. So, I expect the result to be: 2011-03-21 name003 line3 2011-03-22 name002 line4 2011-03-22 name001 line5 Could someone give me a solution with bash/awk/sed?
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