\na line-feed (newline) character (ASCII 10)
ifacethe literal text iface (case sensitive) \s+any whitespace character, repeated at least once
eth0the literal text eth0 (case sensitive) \s+any whitespace character, repeated at least once
inetthe literal text inet (case sensitive) \s+any whitespace character, repeated at least once
staticthe literal text static (case sensitive) \s*any whitespace character, repeated any number of times
\na line-feed (newline) character (ASCII 10)
\s+any whitespace character, repeated at least once
addressthe literal text address (case sensitive) \s+any whitespace character, repeated at least once