How to Set Up Wi-Fi in Ubuntu: A Complete Guide from Connection to Troubleshooting

Ubuntu — one of the most popular operating systems based on Linux, but the setting Wi-Fi it sometimes causes difficulties, especially for users accustomed to Windows or macOS. Unlike proprietary systems, where drivers and utilities are often installed automatically, Ubuntu Manual configuration may be required, from selecting the correct network manager to installing missing drivers for the adapter.

This article will help you understand all the nuances: from basic network connection to diagnosing signal problems or hardware compatibility. We'll look at how graphical tools (NetworkManager), and console commands (nmcli, iwconfig), and we'll also give recommendations for optimizing connection speed and stability. We'll pay special attention to common errors, such as when the network is visible but doesn't connect, or when Ubuntu does not detect the adapter at all Wi-Fi.

1. Checking the presence of a Wi-Fi adapter in the system

Before setting up your connection, make sure that your Wi-Fi adapter recognized by the system. In Ubuntu This can be done in several ways:

• 🔍 Through Terminal: enter the command lspci | grep -i network for wired and PCI-adapters or lsusb For USB-modules. If the output contains lines with Network Controller or Wireless — adapter detected.
• 🖥️ Through Graphical interface: open Settings → About → Hardware. In the section Net Your adapter should be displayed.
• 📋 Through dmesg: team dmesg | grep -i wifi will show driver loading logs. Look for error messages (for example, firmware missing).

If the adapter is not displayed, the problem may be due to missing drivers or a blockage RF-kill (hardware switch Wi-Fi on a laptop). Check the lock status with the command:

rfkill list

If there is a line in the output Soft blocked: yes or Hard blocked: yes, unlock the adapter:

sudo rfkill unblock wifi

2. Connecting to Wi-Fi via the graphical interface

The easiest way to connect to the network is to use the built-in NetworkManagerThe instruction is valid for Ubuntu 22.04 LTS and newer:

1. Click on the network icon in the upper right corner of the panel (the icon looks like triangle or waves).
2. Select the desired network from the list. If it is not there, click Connect to hidden network....
3. Enter your password (if required) and click Connect.

If the network is secure WPA3, and your adapter does not support it, try changing the security type on the router to WPA2-PSK (in the router settings, section Wireless Security).

Disable VPN (if used) | Make sure the router is turned on and distributing the network | Check that the password is entered correctly (case sensitive!) | Restart the adapter with the command sudo systemctl restart NetworkManager

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IN Ubuntu 24.04 Support for quickly switching between networks via the context menu of the network icon has been added—just click on the current connection and select another from the list without re-entering the password (if it is saved).

3. Setting up Wi-Fi via the terminal (nmcli)

If the graphical interface is not available (for example, on the server version Ubuntu), use the utility nmcliBasic commands:

• 📡 View available networks: nmcli dev wifi list
• 🔗 Network connection: nmcli dev wifi connect "Network_Name" password "password"
• 🔄 Reconnect: nmcli con up "NetworkName"
• ❌ Deleting a saved network: nmcli con delete "NetworkName"

Network connection example MyWiFi with a password 12345678:

nmcli dev wifi connect "MyWiFi" password "12345678" ifname wlan0

To save your settings for future use, add the parameter --ask (the system will ask for confirmation to save the password).

4. Troubleshooting Wi-Fi drivers

One of the most common problems is the lack of drivers for Wi-Fi adapterSymptoms: Network not detected, adapter not showing up in lspci or marked as UNCLAIMED.

First, check your adapter model:

lspci -knn | grep -iA3 network

In the output, look for lines with Kernel driver in use And Kernel modulesIf the driver is not loaded, install it:

After installation, reboot the system or restart NetworkManager:

sudo systemctl restart NetworkManager

⚠️ Attention: Drivers for some adapters (for example, Broadcom BCM4313) may conflict with open alternatives (b43). Before installing the proprietary driver, remove old versions: sudo apt purge b43-fwcutter firmware-b43-installer

5. Optimize Wi-Fi speed and stability

If Wi-Fi If the app is running slowly or crashing frequently, try the following settings:

• 📶 Change the channel on your router: use 5 GHz for less interference (but smaller coverage area) or 2.4 GHz for better penetration through walls. Channels 1, 6, 11 on 2.4 GHz least overloaded.
• 🔧 Disable adapter power saving: create a file /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf with a line [connection] wifi.powersave = 2 and restart NetworkManager.
• 🔄 Update your router firmware: outdated firmware may cause compatibility issues with Ubuntu.
• 🛡️ Check your settings MTU: If packets are fragmented, reduce MTU to 1400:

  sudo ifconfig wlan0 mtu 1400

To diagnose speed use iwconfig And ping:

iwconfig wlan0 | grep "Bit Rate"

ping -c 10 8.8.8.8

If your ping is high (>100 ms) or packets are being lost, the problem may be interference or a weak signal. Use the utility wavemon to analyze the signal level:

sudo apt install wavemon
sudo wavemon

6. Setting up automatic connection and network priorities

To Ubuntu automatically connect to the preferred network, adjust the priorities in NetworkManager:

1. Open the network settings via the icon in the panel.
2. Select Network Settings → Wi-Fi.
3. Click on the gear next to the desired network.
4. Enable the option Automatically connect to this network.
5. To change the priority, drag the network to the top of the list in the section Well-known networks.

The priority is set via the terminal using the command:

nmcli con mod "NetworkName" connection.autoconnect-priority 10

The higher the number, the higher the priority. To disable auto-connection:

nmcli con mod "Network_Name" connection.autoconnect no

⚠️ Warning: If you use netplan (for example, in Ubuntu Server), automatic connection is configured in the file /etc/netplan/01-netcfg.yaml. Add parameter access-points with indication password And hidden: true for hidden networks.

7. Diagnostics and troubleshooting

If Wi-Fi If it doesn't work despite all your efforts, please follow the diagnostic steps below:

1. Check the physical connection: Make sure that the adapter (especially USB) is tightly connected. For PCIe- check if the card module has come out of the slot.
2. Restart the network:

   sudo systemctl restart systemd-networkd
   sudo systemctl restart NetworkManager

3. Check the logs:

   journalctl -u NetworkManager --no-pager | grep -i wifi

   Look for errors like authentication failed or association rejected.

4. Reset network settings:

   sudo nmcli networking off
   sudo nmcli networking on

Typical errors and solutions:

FAQ: Frequently asked questions about setting up Wi-Fi in Ubuntu

nmcli dev wifi connect "Network_Name" password "password" hidden yes

sudo apt install ap-hotspot
sudo ap-hotspot start

git clone https://github.com/oblique/create_ap
cd create_ap
sudo make install
sudo create_ap wlan0 eth0 MyHotspot MyPassPhrase

sudo rm /etc/NetworkManager/system-connections/*
sudo systemctl restart NetworkManager

sudo apt purge network-manager netplan.io
sudo apt install network-manager netplan.io
sudo systemctl restart systemd-networkd