How to compare three files?

To compare three files in Linux, you can use the diff command with the -y option for side-by-side comparison or use the diff3 command specifically designed for comparing three files. Here’s how to do it:

Using diff3

The diff3 command compares three files and shows the differences among them. The syntax is:

diff3 file1 file2 file3

Example:

If you have three files, file1.txt, file2.txt, and file3.txt, you can run:

diff3 file1.txt file2.txt file3.txt

Output:

The output will show the differences between the three files, indicating which lines are unique to each file or if they have common lines.

Using diff with -y

If you prefer to see a side-by-side comparison of three files, you can use:

diff -y file1 file2 | diff -y - file3

This command first compares file1 and file2, then compares the output with file3.

Further Learning:

For more advanced comparisons, consider exploring options like -u for unified output or using version control tools like git for file comparisons. If you have any questions or need clarification, feel free to ask!