cotton:tldr:af7c1

The command cotton -u ${base_url} ${filename}.md is likely a command-line instruction that involves a tool or program called "cotton." Without knowing more context about the specific tool or program, a complete explanation can't be provided.

However, based on the available information, here is a breakdown of the command:

• cotton is the name of the tool or program being executed.
• -u is likely an option or flag for the cotton tool, which indicates that a URL (likely specified using the ${base_url} variable) should be used.
• ${base_url} is a variable, which should be replaced with the actual base URL you want to use. For example, if ${base_url} is https://www.example.com, then it would be substituted with that in the command.
• ${filename}.md is another variable, which should be replaced with the actual name you want to use for the file. The .md extension suggests that it is a Markdown file. For example, if ${filename} is myfile, then it would be substituted with myfile.md in the command.

To summarize, the command uses the cotton tool with the -u option and provides a base URL and a filename to work with.