LinuxQuestions.org - [SOLVED] need some help on using diff command

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kingston

01-13-2011 02:51 AM

need some help on using diff command

hi all,

i have file1 and file2.

Quote:

File 1 contents are,
eingston
ewinston
eononono
edpdpdpd

Quote:

File 2 contents are,
edsdsdsd
ewinston
edpdpdpd
eingston

Here i want to compare these two files with diff command and need to take the common things in a separate file. File contents are 7 strings in length and everything will start with the character e.
File 3 contents should be

Quote:

ewinston
edpdpdpd

Please help me.

druuna

01-13-2011 02:59 AM

Hi,

Your examples have 3 entries that are in both files, not 2......

To use diff (or in this case comm) you need to have sorted in-files. If they are sorted then the following will show entries that are in both files: comm -12 file1 file2

Example run:

Code:

$ cat file1

edpdpdpd

eingston

eononono

ewinston



$ cat file2

edpdpdpd

edsdsdsd

eingston

ewinston



$ comm -12 file1 file2

edpdpdpd

eingston

ewinston

Hope this helps.

kingston

01-13-2011 03:10 AM

thanks drunna, it worked.
I didnt sort the files first. Now it works as i want. Thanks again, One more question.
In file1, eononono was remaining or we can say its not in file2. I want to take this in a separate file.
I need the same from file2. Please help me

druuna

01-13-2011 03:36 AM

Hi,

Files that are unique to file1: comm -23 file1 file2

Code:

$ comm -23 file1 file2

eononono

Files that are unique to file2: comm -13 file1 file2

Code:

$ comm -13 file1 file2

edsdsdsd

Hope this helps.

kingston

01-13-2011 04:28 AM

thanks man, you are great.
It worked well.

druuna

01-13-2011 04:37 AM

You're welcome :)

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