You can use diff -W or –width=NUM options to output at most NUM (default 130) print columns. This option is used with –side-by-side option to define the maximum column width.
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## Control the width of column in side by side option echo -e "1\n2\n3\n4" > myfile1 ## create some files echo -e "1\n2\n4\n6\n5" > myfile2 diff --side-by-side --width=10 myfile1 myfile2 ## displays the output in two cloumns with column width=10. ## returns ## 1 1 ## 2 2 ## 3 < ## 4 4 ## > 6 ## > 5 diff --side-by-side myfile1 myfile2 ## output without the --width option ## returns ## 1 ## 1 ## 2 ## 2 ## 3 ## < ## 4 ## 4 ## ## > 6 ## ## > 5 |