Compare two logs line by line and show differences and if the order of words from a line are not the same

Question

I Don't need a tool I need an implemetation/alghorithm :) I need to make a shellscript because I can't install anything on the server

f2.txt

She has 123 apples
George 18 years is old
Florin it's leaving
Michael it's not here
Peter is smiling

f1.txt

She has 132 apples
George is 18 years old
Michael it's not here
Peter is smiling
He is sleeping

Desired output:

diff is at:
line 1 : 123 instead of 132
line 2 : 18 years is instead of is 18 years
lines missing:
He is sleeping
lines added:
line 3: Florin it's leaving

score 3 · Answer 1 · answered Oct 05 '17 at 09:20

3

Not exactly the format you're asking for, but wdiff is probably your best bet:

$ wdiff f1.txt f2.txt
She has [-132-] {+123+} apples
George [-is-] 18 years {+is+} old
{+Florin it's leaving+}
Michael it's not here
Peter is smiling
[-He is sleeping-]

answered Oct 05 '17 at 09:20

Satō Katsura

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sdiff also provides an alternative, showing differences side by side. – Raman Sailopal Oct 05 '17 at 09:36
it's a great tool but I can't install anything on the server so I have to implement it manually – Stoian George Oct 05 '17 at 10:16
@StoianGeorge, presumably, you'll still have to write a script for that. In what way is that different from copying a wdiff executable? – Stéphane Chazelas Oct 06 '17 at 14:10
@StéphaneChazelas it's not different. I have to write the algorithm of wdiff – Stoian George Oct 09 '17 at 12:02

Compare two logs line by line and show differences and if the order of words from a line are not the same

1 Answers1