Any other useful options?

Yes, here are some additional useful options for the cat command:

1. -n: Number all output lines.

   cat -n filename.txt

2. -b: Number non-empty output lines only.

   cat -b filename.txt

3. -s: Suppress repeated empty output lines.

   cat -s filename.txt

4. -v: Show non-printing characters (except for tabs and line ends).

   cat -v filename.txt

5. -A: Show all non-printing characters, including tabs and line endings.

   cat -A filename.txt

6. -e: Equivalent to -vE, shows non-printing characters and line endings.

   cat -e filename.txt

These options can be combined as needed to customize the output of the cat command for better readability and analysis of file contents.