unix diff side-to-side results?

How can I plot the results of a unix diff command side-to-side instead of one difference after the other? See below for an example:

    diff /tmp/test1  /tmp/test2
1,4c1,2
< asfdsadf
< asdfsad
< fsaf
< fdsadf
---
> asdfsafdsf
> saf
6,8d3
< sadf
< asdf
< sadf
10d4
< fasd
12,13c6,14
< sadfa
< fd
---
> sadf
> sadf
> sadf
> sadf
> sadf
> sadf
> sadf
> sadf
> safa

I would like to have something like:

diff /tmp/test1  /tmp/test2
1,4c1,2
< asfdsadf       > asdfsafdsf
< asdfsad        > saf       
< fsaf
< fdsadf
---
6,8d3
< sadf
< asdf
< sadf
10d4
< fasd
12,13c6,14
< sadfa               > sadf
< fd              > sadf
---               > sadf
              > sadf
              > sadf
              > sadf
              > sadf
              > sadf
              > safa

From man diff, you can use -y to do side-by-side.

-y, --side-by-side
       output in two columns

Hence, say:

diff -y /tmp/test1  /tmp/test2

Test

$ cat a                $ cat b
hello                  hello
my name                my name
is me                  is you

Let's compare them:

$ diff -y a b
hello                                                           hello
my name                                                         my name
is me                                                         | is you

From icdiff's homepage:

Your terminal can display color, but most diff tools don't make good use of it. By highlighting changes, icdiff can show you the differences between similar files without getting in the way. This is especially helpful for identifying and understanding small changes within existing lines.

Instead of trying to be a diff replacement for all circumstances, the goal of icdiff is to be a tool you can reach for to get a better picture of what changed when it's not immediately obvious from diff.

IMHO, its output is much more readable than diff -y.

You can use:

sdiff  file1 file2

diff -y file1 file2

vimdiff file1 file2

for side by side display.

You should have sdiff for side-by-side merge of file differences. Take a read of man sdiff for the full story.

diff -y --suppress-common-lines file1 file2

You can simply use:

diff -y fileA.txt fileB.txt | colordiff

It shows the output splitted in two colums and colorized! (colordiff)

Use the -y option:

diff -y file1 file2

Try cdiff - View colored, incremental diff in workspace or from stdin with side by side and auto pager support.

You can use vimdiff.

Example:

vimdiff file1 file2

If your files have inconsistent use of spaces and tabs, you may find it helpful to include the -t argument to expand the tabs:

diff -ty file1 file2

来源：https://stackoverflow.com/questions/17195308/unix-diff-side-to-side-results

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unix

diff