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thank you all for your contribution!! I have a problem, can one of you sed geeks help me? I need to identify port and change one digit. Ports are 4 digit long. 5121, 5123 for example below. and want to make it 5221, 5223 etc.. please please appreciate any help!
R2_SC_GOLDEN_STATE=5121 188.8.131.52 554,5122 184.108.40.206 554,5123 220.127.116.11 554
In plain sed, it can be done like as shown below:
# add 100 to a 4-digit number enclosed in \n
Or, with perl you could do:
perl -lpe 's/\b(\d\d)(?=\d\d\b)/int(($1+1)\/100)-1?$1+1:"00"/eg'
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