ffsend:tldr:a5976

The command "ffsend upload ${filename}" is used to upload a file called ${filename} using the ffsend tool.

• "ffsend" is a command-line tool that allows you to easily and securely share files over the internet via the Firefox Send service.
• "upload" is a subcommand of ffsend that specifies the action to be performed, which is uploading a file.
• "${filename}" is a placeholder that represents the name of the file you want to upload. In actual usage, you would replace "${filename}" with the actual name of the file you wish to upload.

So when you execute this command, ffsend will initiate the upload process for the specified file, thus allowing you to securely share the file with others.