Ghepes · February 22, 2025 13:26
diff --git a/Network persistent b/Network persistent
 If you are running **Ubuntu 22.04.5 LTS** in a virtual machine and want to ensure that your IPv4 network settings are not lost across reboots or configuration changes, follow these steps:

 ---

 ## **1. Saving Current Configuration**
 Before making any changes, save your current network settings:

 ```bash
 mkdir -p ~/network_backup
 ip a > ~/network_backup/current_ip.txt
 ip route > ~/network_backup/current_routes.txt
 nmcli con show > ~/network_backup/nmcli_connections.txt
 nmcli con show --active > ~/network_backup/active_connections.txt
 ```

 If you are using **Netplan**:
 ```bash
 sudo cp /etc/netplan/*.yaml ~/network_backup/
 ```

 If you are using **NetworkManager**:
 ```bash
 nmcli connection export > ~/network_backup/nmcli_export.nm
 ```

 ---

 ## **2. Checking Current Configuration**
 To see details about the active connection:
 ```bash
 nmcli device show
 nmcli connection show
 ````

 If you are using **Netplan**:
 ```bash
 cat /etc/netplan/*.yaml
 ```

 If you are using `ifconfig` (install it if not):
 ```bash
 sudo apt install net-tools -y
 ifconfig -a
 ```

 ---

 ## **3. Manually Configuring Static IP (If Necessary)**

 If the IP changes after reboot, set it manually in a Netplan file.

 1. **Edit the Netplan file**:
 ```bash
 sudo nano /etc/netplan/00-installer-config.yaml
 ```

 2. **Configure a static IP** (replace with the desired IP):
 ```yaml
 network:
 ethernets:
 ens33: # Change with your interface (ex: `ens160`, `eth0`)
 dhcp4: no
 addresses:
 - 192.168.1.100/24
 gateway4: 192.168.1.1
 nameservers:
 addresses:
 - 8.8.8.8
 - 8.8.4.4
 version: 2
 ```

 3. **Apply the changes**:
 ```bash
 sudo netplan apply
 ```

 4. **Verify the new configuration**:
 ```bash
 ip a
 ip route
 ```

 ---

 ## **4. Ensuring Configuration Persistence**
 If settings are still lost on reboot, follow these steps:

 1. **Make sure the `systemd-networkd` service is started correctly**:
 ```bash
 sudo systemctl enable systemd-networkd
 sudo systemctl restart systemd-networkd
 ```

 2. **If you are using NetworkManager, check that the interface is configured correctly**:
 ```bash
 nmcli con show
 ```

 If it shows as **dhcp active**, manually change it to static:
 ```bash
 nmcli con mod "Ethernet connection 1" ipv4.method manual ipv4.addresses 192.168.1.100/24 ipv4.gateway 192.168.1.1 ipv4.dns "8.8.8.8 8.8.4.4"
 nmcli con up "Ethernet connection 1"
 ```

 3. **Make sure Netplan is applied to each boot**:
 ```bash
 sudo crontab -e
 ```
 Add this line at the end:
 ```
 @reboot sudo netplan apply
 ```

 ---

 ## **5. Restoring the Configuration in Case of Problems**
 If after an update or reboot the settings were lost, run:

 ```bash
 sudo cp ~/network_backup/*.yaml /etc/netplan/
 sudo netplan apply
 ```





 If you use NetworkManager:
 ```bash
 nmcli connection import type ethernet file ~/network_backup/nmcli_export.nm
 nmcli con up "Ethernet connection 1"
 ```

 ---

 Now your network settings will remain persistent regardless of updates or reboots. 🚀
	If you are running Ubuntu 22.04.5 LTS in a virtual machine and want to ensure that your IPv4 network settings are not lost across reboots or configuration changes, follow these steps:

	---

	## 1. Saving Current Configuration
	Before making any changes, save your current network settings:

	```bash
	mkdir -p ~/network_backup
	ip a > ~/network_backup/current_ip.txt
	ip route > ~/network_backup/current_routes.txt
	nmcli con show > ~/network_backup/nmcli_connections.txt
	nmcli con show --active > ~/network_backup/active_connections.txt
	```

	If you are using Netplan:
	```bash
	sudo cp /etc/netplan/*.yaml ~/network_backup/
	```

	If you are using NetworkManager:
	```bash
	nmcli connection export > ~/network_backup/nmcli_export.nm
	```

	---

	## 2. Checking Current Configuration
	To see details about the active connection:
	```bash
	nmcli device show
	nmcli connection show
	````

	If you are using Netplan:
	```bash
	cat /etc/netplan/*.yaml
	```

	If you are using `ifconfig` (install it if not):
	```bash
	sudo apt install net-tools -y
	ifconfig -a
	```

	---

	## 3. Manually Configuring Static IP (If Necessary)

	If the IP changes after reboot, set it manually in a Netplan file.

	1. Edit the Netplan file:
	```bash
	sudo nano /etc/netplan/00-installer-config.yaml
	```

	2. Configure a static IP (replace with the desired IP):
	```yaml
	network:
	ethernets:
	ens33: # Change with your interface (ex: `ens160`, `eth0`)
	dhcp4: no
	addresses:
	- 192.168.1.100/24
	gateway4: 192.168.1.1
	nameservers:
	addresses:
	- 8.8.8.8
	- 8.8.4.4
	version: 2
	```

	3. Apply the changes:
	```bash
	sudo netplan apply
	```

	4. Verify the new configuration:
	```bash
	ip a
	ip route
	```

	---

	## 4. Ensuring Configuration Persistence
	If settings are still lost on reboot, follow these steps:

	1. Make sure the `systemd-networkd` service is started correctly:
	```bash
	sudo systemctl enable systemd-networkd
	sudo systemctl restart systemd-networkd
	```

	2. If you are using NetworkManager, check that the interface is configured correctly:
	```bash
	nmcli con show
	```

	If it shows as dhcp active, manually change it to static:
	```bash
	nmcli con mod "Ethernet connection 1" ipv4.method manual ipv4.addresses 192.168.1.100/24 ipv4.gateway 192.168.1.1 ipv4.dns "8.8.8.8 8.8.4.4"
	nmcli con up "Ethernet connection 1"
	```

	3. Make sure Netplan is applied to each boot:
	```bash
	sudo crontab -e
	```
	Add this line at the end:
	```
	@reboot sudo netplan apply
	```

	---

	## 5. Restoring the Configuration in Case of Problems
	If after an update or reboot the settings were lost, run:

	```bash
	sudo cp ~/network_backup/*.yaml /etc/netplan/
	sudo netplan apply
	```





	If you use NetworkManager:
	```bash
	nmcli connection import type ethernet file ~/network_backup/nmcli_export.nm
	nmcli con up "Ethernet connection 1"
	```

	---

	Now your network settings will remain persistent regardless of updates or reboots. 🚀