The documentation pages use the following symbols:

• ... A Line or series of lines of text which are skipped.
• $ Normal user command prompt
• # Root user command prompt
• | Pipeline. Send the output of a command to the input of another.
• > I/O redirection. Send the output from a command to somewhere.
• >> I/O redirection - append. Send the output from a command to be appended to somewhere.
• <word> A variable, change to suit your needs.
• lo Loop Back Interface, 127.0.0.1
• Eth Ethernet Interface.