No WiFi on Ubuntu

hello,
here are several steps to recover a wireless Internet connection on Ubuntu/Linux

1) Check that your wireless adapter is enabled and that Ubuntu recognizes it: see Device recognition and operation. Check if drivers are available for your wireless adapter; install and verify them: see Device drivers. Check your Internet connection: see Wireless connections.

2)How to connect to a wireless network with Ubuntu

Open the system menu on the right side of the top bar.
Select Wi-Fi not connected to expand the menu.
Choose Select a network.
Browse the names of nearby networks. Select the one you want and press Connect. …
Enter the network password and press Connect.

3)How to connect Ubuntu 20.04 to the Internet
Connect to a wireless network

Open the system menu on the right side of the top bar.
Select Wi-Fi not connected. …
Click on Select a network.
Click on the name of the desired network, then click on Connect. …
If the network is password protected (encryption key), enter the password when prompted and click
on Connect.

4)How to detect Wi-Fi on Ubuntu
Wireless connection troubleshooter
Open a Terminal window, type lshw -C network and press Enter. …
Browse the information that has appeared and find the Wireless interface section. …
If a wireless device is listed, proceed to the Device drivers step.

For a wired connection:
How to enable Ethernet on Ubuntu:

Click on the gear and key icon in the launcher to open system settings. …
Once the settings are open, double-click on the Network tile.
Once there, select the Wired or Ethernet option in the left panel.
At the top right of the window, there will be a switch indicating On.

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Knowledge is gained through experience; everything else is just information. A. Einstein