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The combination of grep and sed is rather unnecessary, as sed can do both steps in one: sed -nr 's/^(pro|con)(.*)/\2/p' | sort | uniq -d

Peter.O
– Peter.O

2015-07-28 22:04:57 +00:00
Commented Jul 28, 2015 at 22:04
I'll update to reflect this - thanks for the tip! Keep in mind that it only works in GNU sed, and not BSD sed.

DopeGhoti
– DopeGhoti

2015-07-28 23:26:35 +00:00
Commented Jul 28, 2015 at 23:26
2

replace -r with -E and it will work with both seds ... also, Peter meant you can drop egrep and use just sed

don_crissti
– don_crissti

2015-07-28 23:32:53 +00:00
Commented Jul 28, 2015 at 23:32

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