sort the files and delete the duplicate lines that contain a pattern
 

Hi,

I need to sort a file and delete the duplicate lines that contains the particular pattern.

for ex:

sort output is:

hi
hi
hi
how r u
how r u
how r u

i'm searching for "hi" i need to delete that duplicate alone not how r u

output need to be

hi
how r u
how r u
how r u

thanks...

See if this works for you:

sorry

It's not working. I need to delete the all the duplicate which contains my search pattern

thanks...

How exactly is it "not working"? What output do you get?
But yeah, I don't think it works as promised.


This awk command should work. It sets a flag after the first match so that subsequent lines with the same pattern won't print:
The first argument fed to awk is a variable setting the pattern you want to match ("pat=hi"). You have to quote the whole thing so that it's not treated as a shell variable. The second argument is a process substitution that supplies the pre-sorted file.

Edit: I just realized...the input pattern is treated as a regular expression, so the above will match any line containing that substring. To force exact line matches only, use "pat=^hi$" (or another regex that targets only what you want).


Finally, please use [code][/code] tags around your code and data, to preserve formatting and to improve readability.

thank you
 

hi,

thank you so much... it's working..
thanks once again