cmp:tldr:45e91

The command "cmp ${filename1} ${filename2}" is used to compare the contents of two files ${filename1} and ${filename2}.

Here's how it works:

1. The "cmp" command is the main command being used here. It stands for "compare".
2. ${filename1} and ${filename2} are variables representing the names or paths of the two files that you want to compare. The variables should be replaced with the actual filenames or paths when using the command.
3. The command compares the contents of ${filename1} and ${filename2} byte by byte.
4. If the files are identical, there is no output or error messages.
5. If the files differ, the command outputs the byte and line numbers where the first difference occurred, as well as the differing byte values.
6. The command can be used to check if two files are identical or to find the differences between them.

Example: Suppose you have two files named "file1.txt" and "file2.txt". To compare their contents, you would use the command: cmp file1.txt file2.txt