File Transfer Protocol. FTP is a program used to exchange files between servers. It is invoked by typing ftp. It can accept a hostname as a parameter, eg. Telnet is a program used to logon to another server.
Lynx is a text based web browser.
It is useful for checking to see that new accounts have been properly setup. Lynx is typically invoked with a url as a parameter. A symbolic link, is a link to a file or directory. A Brief Summary VI stands for visual editor. It is the most commonly used means of editing files on unix servers.