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I could be wrong, but I noticed on a trial install on a laptop, the LAN conneciton did not show up as eth0, but p3p1 instead, and the status screen. Install Ubuntu 18.04.1 LTS Linux Tutorial. Install some VoIP software: FreePBX, FusionPBX, Elastix, A2Billing, Homer, Zabbix. Free software installation: Camtasia 9, BlackMagic Design.
. From the computer running Ubuntu open a terminal window by pressing the ALT + T keys at the same time. Type the following command into the window: ifconfig. A list of potential access points will be displayed in short blocks of text with a line space between each one.
If your machine is connected directly to the router using a cable then look for the block starting ETH. If, however, you are using a wireless connection look for the section starting something like WLAN0 or WLP2S0. The option will vary for the wireless access point depending on the network card used.
There are generally 3 blocks of text. ETH is for wired connections, Lo stands for local network and you can ignore this one and the third one will be the one you are looking for when connecting via Wi-Fi. Within the block of text look for the word INET and note the numbers down on a piece of paper. They will be something along the lines of 192.168.1.100. This is your internal IP address. How To Find Your External IP Address.