diff3:tldr:75081

The command "diff3 ${filename1} ${filename2} ${filename3}" is used to compare three different files and display the differences between them.

Here's a breakdown of the command:

• "diff3" is the name of the command-line tool used to perform the comparison.
• "${filename1}", "${filename2}", and "${filename3}" are placeholders for the actual names of the three files you want to compare. You should replace them with the actual file names/path.

When you run this command, "diff3" will analyze the contents of the three files and show the differences between them. The output will consist of a combination of the following symbols:

• "<" signifies lines that are unique to "${filename1}".
• "|" denotes the lines that are common to all three files.
• ">" represents lines that are specific to "${filename3}".

The command is particularly useful when you are working with multiple versions of the same file, such as when collaborating on a shared document, or merging different branches of code in software development.