Final answer:
The symbol used to redirect stderr in computer programming is the greater than symbol (>), and it is commonly used in many programming languages.
Step-by-step explanation:
In command-line interfaces, the symbol ">" is used to redirect stderr (standard error) in Unix-like systems.
By combining this symbol with the file descriptor for stderr, "2", and specifying the destination (e.g., a file or another command), you can divert error messages from the screen to a designated location.
For instance, "2> error.log" redirects stderr to a file named "error.log."
This process ensures that error output generated by a command or script is captured separately, allowing users to review, analyze, or manage error messages apart from regular command output.
It's a powerful technique for troubleshooting, debugging, or managing error logs efficiently within the Unix command-line environment.