Manually assign a static IP address

Here are the terminal commands to manually assign a static IP address to your network interface in Arch Linux:

Identify Your Network Interface: Use the ip link command to list all network interfaces and identify the one you’re using (e.g., wlan0 for Wi-Fi or eth0 for Ethernet).
```
ip link
```
Bring the Network Interface Down: Replace INTERFACE with your network interface name (e.g., wlan0).
```
sudo ip link set INTERFACE down
```
Assign a Static IP Address: Replace INTERFACE with your network interface name, 192.168.1.10 with the IP address you want to assign, and 192.168.1.1 with your router’s IP address.
```
sudo ip addr add 192.168.1.10/24 dev INTERFACE
```
Set the Default Gateway: Replace 192.168.1.1 with your router’s IP address.
```
sudo ip route add default via 192.168.1.1
```
Bring the Network Interface Up:
```
sudo ip link set INTERFACE up
```
Configure DNS (optional but recommended): Edit the /etc/resolv.conf file to set your DNS server. You can use your router’s IP or a public DNS server like Google’s (8.8.8.8).
```
sudo nano /etc/resolv.conf
```
Add the following line:
```
nameserver 192.168.1.1
```
Or for Google DNS:
```
nameserver 8.8.8.8
```

By following these steps, you should be able to manually assign a static IP address to your network interface in Arch Linux, allowing you to connect to your OpenWrt router for further configuration.