What is the Linux command to add tftp service for Ubuntu? [closed]

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i'm following instructions about: "Installing and setting TFTPD in Ubuntu": i开发者_如何学JAVAt asks to: Create /etc/xinetd.d/tftp and put this entry:

service tftp
{
protocol        = udp
port            = 69
socket_type     = dgram
wait            = yes
user            = nobody
server          = /usr/sbin/in.tftpd
server_args     = /tftpboot
disable         = no
}

what does it mean to create.... is there any command i need to type?? and "put this entry" - it means to type in one line all the lines above? i don't know Linux & i need your help please........

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And note this warning in the tftpd package description:

Tftpd is a server which supports the Internet Trivial File Transfer Protocol (RFC 783). The TFTP server operates at the port indicated in the `tftp' service description; see services(5). The server is normally started by inetd(8). Tftpd is not suitable for use with the PXE bootloader; for that, use atftpd or tftpd-hpa.

I don't know why it isn't suitable, but when it is labeled like that, I would suggest paying attention. :)

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That is a file. What you will do is open up a terminal and sudo nano /etc/xinetd.d/tftp

paste the contents, save & close. All done.