Changes

/* TFTP server */
Jan 23 05:35:05 denis-linux tftpd-hpa[2539]: ...done.
Jan 23 05:35:05 denis-linux systemd[1]: Started LSB: HPA's tftp server.
</pre>
 
* Prepare UEFI grub bootloader and configuration file grub.cfg:
<pre>
$ sudo cp /usr/lib/grub/x86_64-efi-signed/grubnetx64.efi.signed /var/lib/tftpboot/grubx64.efi
$ sudo mkdir -p /var/lib/tftpboot/grub
</pre>
* Edit configuration file: /var/lib/tftpboot/grub/grub.cfg
<pre>
menuentry "linuxmint-19.1-cinnamon-64bit.iso" {
linux iso/linuxmint-19.1-cinnamon-64bit.iso/casper/vmlinuz nfsroot=10.0.0.1:/var/lib/tftpboot/iso/linuxmint-19.1-cinnamon-64bit.iso boot=casper netboot=nfs toram
initrd iso/linuxmint-19.1-cinnamon-64bit.iso/casper/initrd.lz
}
</pre>
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