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Old 01-27-2008
shamrock shamrock is offline Forum Advisor  
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Join Date: Oct 2007
Location: USA
Posts: 750
Quote:
Originally Posted by mirusnet View Post
What is the easiest way to count duplicate lines?

example:
aaa
b
b
b
b
b

Output:
aaa 1
b 5


Sorry, maybe someone already ask for it,
but I can not find.
A quick search of this site would have turned up lots of threads on related issues.

Code:
awk '{count[$1]++}END{for(j in count) print j,count[j]}'