What is the difference between `-o` and `-O`?

The difference between -o and -O in the curl command is in how the output file is named:

• -o <filename>: This option allows you to specify a custom filename for the output. You can choose any name you want for the file.

  Example:

  curl -o myfile.txt http://example.com

  In this case, the content will be saved to myfile.txt.

• -O: This option saves the output using the same name as the remote file. It takes the filename from the URL and saves it directly.

  Example:

  curl -O http://example.com/file.txt

  Here, the content will be saved as file.txt, which is the name of the file in the URL.

In summary, use -o for a custom filename and -O to save the file with its original name from the URL.