Each line contains a service name followed by a port number, a ``/'', and a protocol, for example 20/tcp. Legal protocol names are ``tcp'' and ``udp''. Port numbers are decimal numbers in the range of 0 to 65535. A service name may contain any printable character other than the comment character (i.e. no spaces, tabs, newlines, or ``#'').
Items are separated by any number of blanks and/or tab characters. A ``#'' indicates the beginning of a comment; characters up to the end of the line are not interpreted by routines which search the file.
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