ftp:tldr:a2d6f
The command "ftp ${ftp-example-com}" is actually a template or a placeholder, and it needs a specific value to be substituted within the curly braces (${...}) to make it a valid command.
In this case, it seems like the intention is to use the FTP command-line program to connect to a specific FTP server or hostname. The placeholder "${ftp-example-com}" suggests that it should be replaced with the actual hostname or address of an FTP server.
For example, if the FTP server you want to connect to is "ftp.example.com", the command would look like this: "ftp ftp.example.com".
Once you replace the placeholder with the correct hostname or address, the command will initiate a connection to the specified FTP server via the FTP program, allowing you to interact with the server, download files, upload files, and perform various FTP operations.