Static IP Configurator

An interactive bash script to configure a static IP address on an Ethernet interface. Automatically detects your distro and uses the appropriate network backend.

Supported Systems

Distro	Backend	Config location
Ubuntu 22.04 / 24.04 / 26.x	Netplan	/etc/netplan/99-static-<iface>.yaml
Debian / Pop!_OS / Linux Mint	Netplan	/etc/netplan/99-static-<iface>.yaml
Arch Linux	systemd-networkd	/etc/systemd/network/20-static-<iface>.network
Manjaro / EndeavourOS / Garuda	systemd-networkd	/etc/systemd/network/20-static-<iface>.network
Unknown distro	Auto-detected	whichever backend is available

Usage

Note: If the script is stored on an NTFS/exFAT mount (e.g. /mnt/...), chmod +x won't work. Always run it with bash directly:

sudo chmod +x ./*.*
sudo bash run.sh

The script is fully interactive — it will prompt you for:

1. Which network interface to configure (listed with current state and IP)
2. Static IP address (e.g. 192.168.1.100)
3. Subnet prefix length (e.g. 24 for a /24 network)
4. Default gateway (e.g. 192.168.1.1)
5. DNS servers, space-separated (defaults to 8.8.8.8 1.1.1.1)

After showing a preview of the generated config, it asks for confirmation before applying.

What it does

• Detects your distro from /etc/os-release
• Lists all available network interfaces with their current IP and link state
• Validates all IP inputs before writing anything
• Backs up any existing config file before overwriting
• Sets chmod 600 on the config file (required by Netplan, good practice for networkd)
• On Arch: automatically handles conflicts with NetworkManager and dhcpcd, and restarts systemd-resolved if present
• On Ubuntu: validates the config with netplan generate before applying; rolls back on failure

Reverting to DHCP

Ubuntu / Debian:

sudo rm /etc/netplan/99-static-<iface>.yaml
sudo netplan apply

Arch Linux:

sudo rm /etc/systemd/network/20-static-<iface>.network
sudo systemctl restart systemd-networkd

Replace <iface> with your interface name, e.g. ens18, eth0, enp3s0.

SSH warning

If you apply the config over SSH, your session will drop when the network restarts. Reconnect using the new static IP you configured.

Requirements

• Bash 4+
• iproute2 (ip command) — present on all modern distros
• Root / sudo access