Quick Guide: Set a Fixed IP on Ubuntu via System Settings
This tutorial explains why a changing desktop IP can disrupt mouse‑sharing tools and walks you through checking the current network settings, recording the IPv4 address, gateway, mask and DNS, and then configuring a static IP (e.g., 192.168.0.210) in Ubuntu’s Network settings, ending with applying the changes and rebooting.
Because mouse‑sharing software requires a stable network connection, a desktop whose IP changes forces a laptop to be re‑configured after each reboot. The author solves this by assigning a static IP address on Ubuntu using the graphical System Settings.
1. View the current network configuration
Open Settings → Network (the interface may vary). The article includes screenshots of the Network panel.
Open a terminal and run ifconfig to see the current netmask and other details.
Record the following values for later use:
IPv4 address (e.g., 192.168.0.x)
Default Route (gateway address)
Mask (usually 255.255.255.0)
DNS servers (the author had two DNS entries)
2. Manually add a static IP
Return to the Network settings page. The layout may differ slightly from the screenshots.
Click the IPv4 section and change the Address method to Manual . Fill in the fields as follows:
Address: choose a static IP that does not conflict with other machines, e.g., 192.168.0.210 (any 200+ address works).
Netmask, Gateway, and DNS: reuse the values recorded in step 1.
After entering the information, click Apply at the bottom right and reboot the computer. The static IP will remain unchanged across restarts.
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Liangxu Linux
Liangxu, a self‑taught IT professional now working as a Linux development engineer at a Fortune 500 multinational, shares extensive Linux knowledge—fundamentals, applications, tools, plus Git, databases, Raspberry Pi, etc. (Reply “Linux” to receive essential resources.)
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