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Diff option to get line number

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# 1  
Old 04-18-2016
Diff option to get line number
Hi,

I am using the below command to get the diff output of two files.
Here in the output file, I wish to add line number in front of each line starting position.
Please suggest the diff options or some command line utilities.

Code:
diff -y file1.txt file2.txt --width=300 > diff_f1_f2_300.txt

Thanks in advance.
Manimuthu
# 2  
Old 04-18-2016
Not clear! But, mayhap,
Code:
diff -y file1.txt file2.txt --width=300 | nl > diff_f1_f2_300.txt

?
This User Gave Thanks to RudiC For This Post:
k_manimuthu
# 3  
Old 04-18-2016
Or maybe this?

file1:
Code:
one
two
three

file2:
Code:
one
two
four

and
Code:
$ diff --old-line-format="%5dn< %L" --new-line-format="%5dn> %L" --unchanged-line-format="" file1 file2
    3< three
    3> four

or
Code:
$ diff --old-line-format="%5dn< %L" --new-line-format="%5dn> %L" --unchanged-line-format="%5dn= %L" file1 file2
    1= one
    2= two
    3< three
    3> four

You can play with the formats to get the results you need. Note: The formatting options are GNU extensions to the diff command.
These 3 Users Gave Thanks to hergp For This Post:
drl jim mcnamara k_manimuthu
# 4  
Old 04-19-2016
Thanks, Here what is the mean for "%5dn< %L"?
Last edited by RudiC; 04-19-2016 at 07:35 AM.. Reason: added icode tags
# 5  
Old 04-19-2016
%5dn prints the line number with a standard printf like format of %5d (numeric, 5 characters wide with leading blanks).

< or > are literal strings.

%L is substituted by the line content.

See also the diff man-page
This User Gave Thanks to hergp For This Post:
k_manimuthu
# 6  
Old 04-19-2016
Note: hergp's really good answer will only work with GNU diff - usually what you have with linux.
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