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awk 'BEGIN {srand()} !/^$/ { if (rand() <= .01) print $0}' file
Should give you ca 10% of the file

With awk
awk '{gsub(/[0-9]*:/,"");gsub(/\.[0-9]*/,"")}1'

perl -lane 'for(@F){s/\d+?:(\d+?)\.\d+/$1/}; print "@F"' file

sed 's![^:]*:\([0-9]*\)\.[0-9]*!\1 !g' file

Try:


sed 's/[0-9]*://g;s/\.[0-9]*//g' inputfile