EdgePoint – set IP configuration to DHCP via command line

Change eth0 to the interface you would like to change.

SSH into EdgePoint and type in configure to get into a configuration prompt

configure

Now set interface eth0 to dhcp

set interfaces ethernet eth0 address dhcp

Delete the static IP address on eth0 if needed

delete interfaces ethernet eth0 address 192.168.1.1/24

Save changes

commit

Setup DHCP server on Linux

Install dhcp server software

sudo apt install isc-dhcp-server

Edit the following config file and set the networking interface it should use. In this case enp60s0

sudo vi /etc/default/isc-dhcp-server

Example line to change

INTERFACESv4="enp60s0"

Now edit the dhcpd.con file

sudo vi /etc/dhcp/dhcpd.conf 

Add the following in. Change the addresses and settings as needed.

subnet 192.168.47.0 netmask 255.255.255.0 {
   range 192.168.47.26 192.168.47.30;
   option domain-name-servers ns1.internal.example.org;
   option domain-name "internal.example.org";
   option subnet-mask 255.255.255.0;
   option routers 192.168.47.1;
   option broadcast-address 192.168.47.255;
   default-lease-time 600;
   max-lease-time 7200;
 }

Set a static ip on the computer that’ll be acting as the dhcp server. You can set it as the gateway if it is the gateway.

Allow dhcp through the firewall

sudo ufw allow  67/udp
sudo ufw reload
Restart the service and connect a client.

sudo systemctl restart isc-dhcp-server

More info.

You can look at dhcp leases with the following command

tail -f /var/lib/dhcp/dhcpd.leases

Set static ip address in Ubuntu 19.04

The network configuration settings for the server edition of Ubuntu are now stored in the following location. Create the file if it does not exist.

sudo vi /etc/netplan/01-network-manager-all.yaml

Add or edit the config file to the following. Change eno1 to your interface name and the address and gateway to the appropriate IP’s

For more information, see netplan(5).
 network:
   version: 2
   renderer: networkd
   ethernets:
     eno1:
      dhcp4: no
      addresses: [192.168.200.24/24]
      gateway: 192.168.200.1
      nameservers:
        addresses: [8.8.8.8,8.8.4.4]

Now apply the changes with the following command.

sudo netplan apply

Find IP address from command line on Linux

Using ip command

ip add

example output

bob@localhost:~$ ip add
1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eno1: mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 38:ea:a7:13:a4:fe brd ff:ff:ff:ff:ff:ff
inet 192.168.1.21/24 brd 192.168.1.1 scope global dynamic noprefixroute eno1
valid_lft 513sec preferred_lft 513sec
inet6 13ac::98fe::ae78:d1ff/64 scope link noprefixroute
valid_lft forever preferred_lft forever
bob@localhost:~$

ifconfig

You may need to install net-tools to use

ifconfig  

example output

bob@localhost:~$ ifconfig 
eno1: flags=4163 mtu 1500
inet 192.168.200.58 netmask 255.255.255.0 broadcast 192.168.1.21
inet6 13ac::98fe::ae78:d1ff prefixlen 64 scopeid 0x20
ether b8:ac:6f:91:01:e8 txqueuelen 1000 (Ethernet)
RX packets 184950632 bytes 9487577263452
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 128473456 bytes 234612443785
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

Using the hostname command

hostname -I

Output is just the IP address. Example below

192.168.1.21