How to find duplicate entries in shell

jyotijain21 · 03-17-2008, 07:41 AM

I want to find the duplicate entries in file in shell.
for example:
cat file.txt
23
45
45
1
23
24

thn the output gve me:

45
23

means entries which are duplicate

acid_kewpie · 03-17-2008, 08:19 AM

looks a lot like homework, but check out the uniq and sort commands.

jimbo1708 · 03-17-2008, 09:07 AM

look at the documentation for sed...

- JB

jyotijain21 · 03-18-2008, 01:31 AM

cn smebody gve me exact solution... i tried with uniq and sort.. bt unable to do

konsolebox · 03-18-2008, 01:50 AM

Code:

cat file.txt | sort | uniq -d

jyotijain21 · 06-23-2008, 01:17 AM

my file contains text like
user,friends,college

now i want delimiter after user
which will gve output like

friends,college