👉 Here's a short explanation of how to configure an Ubuntu machine to join a wireless network, with Netplan.
👉 This is for a wireless network with WPA2 Personal authentication (you need a password).
👉 My test machine is running Ubuntu desktop 21.04.
1. Gather Required Details
-
Get the wireless network details.
This is WPA2 Personal, you're going to need the usual details:- SSID
- Wireless network password
-
Get your Ubuntu machine's wireless adapter name.
You can useip linkorip addfor this.
joe@ub1:~$ ip add ... 3: wlx18d6c7116805: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
In this example, my adapter is wlx18d6c7116805.
2. Compose the Netplan file
- Create a netplan yaml file in the /etc/netplan directory.
- In this example my file is called
mynet1.yaml. - Configure the wireless adapter details under
wifis. - The SSID for your wireless network (the name of the network) is configured under
access-points. - Record the wireless network password under the SSID.
- Make sure to configure any other networking adapters that you require as well, see my previous blog for examples of wired networks here.
Example
network:
ethernets:
eno1:
addresses:
- 10.150.15.25/24
wifis:
wlx18d6c7116805:
dhcp4: yes
dhcp6: yes
access-points:
"IDontLikeSand15":
password: "Supersecure123"
version: 2
renderer: NetworkManager
Example notes
- The wired ethernet adapter
eno1is configured with a static IPv4 address. - The wireless adapter
wlx18d6c7116805is configured for DHCPv4 and DHCPv6 address allocation. - The SSID is
IDontLikeSand15with a password ofSupersecure123.
3. Apply the Netplan file
Run the command netplan apply <your-netplan-file-name>.
4. Verify
- Use the command
iwconfigto check the wireless adapter state. - Use
ip addto view all your network adapter.
$ iwconfig
lo no wireless extensions.
eno1 no wireless extensions.
wlx18d6c7116805 IEEE 802.11bgn ESSID:"IDontLikeSand15" Nickname:"<WIFI@REALTEK>"
Mode:Managed Frequency:2.412 GHz Access Point: 24:F2:7F:D1:89:81
Bit Rate:72.2 Mb/s Sensitivity:0/0
Retry:off RTS thr:off Fragment thr:off
Power Management:off
Link Quality=100/100 Signal level=100/100 Noise level=0/100
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
$ ip add
1: lo: <LOOPBACK,UP,LOWER_UP> 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: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 50:65:f3:2f:c9:a1 brd ff:ff:ff:ff:ff:ff
altname enp0s25
inet 10.150.15.25/24 brd 10.150.15.255 scope global noprefixroute eno1
valid_lft forever preferred_lft forever
inet6 2001:db8:15:0:5265:f3ff:fe2f:c9a1/64 scope global dynamic mngtmpaddr
valid_lft 2591913sec preferred_lft 604713sec
inet6 fe80::5265:f3ff:fe2f:c9a1/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: wlx18d6c7116805: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 18:d6:c7:11:68:05 brd ff:ff:ff:ff:ff:ff
inet 192.168.15.74/24 brd 192.168.15.255 scope link noprefixroute wlx18d6c7116805
valid_lft forever preferred_lft forever
inet6 2001:db8:15:0:a402:f49a:d7be:5049/64 scope global temporary dynamic
valid_lft 599939sec preferred_lft 81131sec
inet6 2001:db8:15:0:1ad6:c7ff:fe11:6805/64 scope global dynamic mngtmpaddr noprefixroute
valid_lft 2591914sec preferred_lft 604714sec
inet6 fe80::1ad6:c7ff:fe11:6805/64 scope link noprefixroute
valid_lft forever preferred_lft forever
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