How to modify a connection profile?

Modifying a Connection Profile with NetworkManager

Modifying a connection profile in NetworkManager allows you to update settings such as the SSID, password, or other parameters of an existing network connection. This is useful when network configurations change or if you need to correct settings.

Steps to Modify a Connection Profile

Identify the Connection Profile: First, you need to know the name of the connection profile you want to modify. You can list all existing profiles using:
```
nmcli connection show
```
Modify the Profile: Use the nmcli connection modify command followed by the profile name and the settings you want to change. Here’s the general syntax:
```
sudo nmcli connection modify <connection-name> <setting> <value>
```
For example, if you want to change the SSID of a Wi-Fi connection named MyLabConnection to NewLabWiFi, you would use:
```
sudo nmcli connection modify MyLabConnection 802-11-wireless.ssid NewLabWiFi
```
If you need to change the Wi-Fi password, you can do so with:
```
sudo nmcli connection modify MyLabConnection 802-11-wireless-security.psk new_password
```
Activate the Changes: After modifying the profile, you may need to bring the connection down and then back up to apply the changes:
```
sudo nmcli connection down MyLabConnection
sudo nmcli connection up MyLabConnection
```
Confirm the Changes: To verify that your changes have been applied, you can check the connection details:
```
nmcli connection show MyLabConnection
```

Example

Here’s a complete example of modifying a Wi-Fi connection profile:

# Change the SSID
sudo nmcli connection modify MyLabConnection 802-11-wireless.ssid NewLabWiFi

# Change the password
sudo nmcli connection modify MyLabConnection 802-11-wireless-security.psk new_password

# Restart the connection to apply changes
sudo nmcli connection down MyLabConnection
sudo nmcli connection up MyLabConnection

# Verify the changes
nmcli connection show MyLabConnection

Further Learning

To deepen your understanding of modifying connection profiles, consider exploring:

LabEx Labs: Look for labs that focus on network configuration and management using nmcli.
Official Documentation: The NetworkManager documentation provides comprehensive details on all available settings and options.

If you have any more questions or need further clarification, feel free to ask! Your feedback is always appreciated.