Diff command file entries in different lines


 
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# 1  
Old 03-23-2013
Diff command file entries in different lines

Hello,

I have two files to compare these contain some contents like this :

FIle 1 :
A
B
C
E

File 2 has some new entries and the old entries are in some different ordre

File 2 could be like this :
C
E
A
B
G
I

How can I use diff command to only get the entries in file 2 that are new , so I dont want to know at which line the files differ, but only the entries in 2 that do not match any entries in 1.??

Note : These files provided here are just examples, but in reality the size of 1 and 2 could be very large, (say 900 entries or more)
# 2  
Old 03-23-2013
Run sort on both files and then use comm. You could also use grep fixed-string full-line matching, with the first file as a pattern file and the second file as the data. This could also be done with awk, by storing each record from the first file in an array and then testing each line from the second file for membership in that array. diff, however, is the wrong tool for the job.

Regards,
Alister

Last edited by alister; 03-23-2013 at 04:48 PM..
# 3  
Old 03-23-2013
Thank you for your help. I used sort and comm and it worked.
# 4  
Old 03-23-2013
You're welcome.

Regards,
Alister
# 5  
Old 03-24-2013
you can also do like this (for diff)

Code:
awk 'NR == FNR { A[$0]=1; next } !A[$0]' file1 file2
G
I

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