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DHCP server and TFTP server

sudo apt-get install isc-dhcp-server
sudo vi /etc/default/isc-dhcp-server

sudo vi /etc/dhcp/dhcpd.conf

sudo systemctl restart isc-dhcp-server
sudo systemctl status isc-dhcp-server

https://download.qemu.org/

sudo apt-get upgrade
sudo apt-get install openssh-server
Enable the ssh service by typing:
sudo systemctl enable ssh

OR enable and start the ssh service immediately

sudo systemctl enable ssh now
Start the ssh service by typing:
sudo systemctl start ssh

架設 tftp server 在 Ubuntu 環境](https://yulun.me/2016/setup-tftp-server-on-ubuntu/)