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How to Add or Change the Default Port on Linux

Use Terminal

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Open the Terminal application. You can open Terminal from the sidebar, or press Ctrl+ Alt+ T.

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View the current default gateway. You can check which default gateway is installed by typing routeand pressing ↵ Enter. The address next to the word "default" is your default gateway and the interface to which it is assigned will be displayed on the right side of the table.

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Delete the current default gateway. If the computer has multiple default ports set up, connection conflicts may occur. If you want to change your router's current IP address, you should delete it first.

Enter command . For example, to delete the default gateway 10.0.2.2 on the routersudo route delete default gw IP Address Adaptereth0, you type sudo route delete default gw 10.0.2.2 eth0.

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Enter command. . For example, if you want to change the IP address of your routersudo route add default gw IP Address Adaptereth0to 192.168.1.254, type sudo route add default gw 192.168.1.254 eth0. You will be asked to enter your user password to complete the command.

Edit configuration file

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Open the configuration file with an editor. Type the command sudo nano /etc/network/interfacesto open the file in Nano software. Editing system files will preserve your changes every time your computer restarts.

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Navigate to the appropriate section. Find the section about the router whose IP address you want to change. For a wired connection, a router is usuallyeth0.

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More . into this section. For example, type to set the default gateway to 192.168.1.254.gateway IP Addressgateway 192.168.1.254

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Save your changes and exit. Press Ctrl+ Xthen press key Yto save changes and exit.

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Restart the network. Restart your network by typing the command sudo /etc/init.d/networking restart.

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