I am trying to install on Ubuntu 18.04.2 x 64 hosted on Digital ocean.
Following this install guide from Git
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# Jitsi Meet quick install
This document describes the required steps for a quick Jitsi Meet installation on a Debian based GNU/Linux system. Debian 8 (Jessie) or later, and Ubuntu 14.04 or later are supported out-of-the-box.
Debian Wheezy and other older systems may require additional things to be done. Specifically for Wheezy, [libc needs to be updated](http://lists.jitsi.org/pipermail/users/2015-September/010064.html).
Also note that a recent default Ubuntu installation has only the `main` repository enabled, and Jitsi Meet needs packages from `universe`. Check your `/etc/apt/sources.list` file, and if `universe` is not present refer to [Ubuntu's documentation](https://help.ubuntu.com/community/Repositories/Ubuntu) on how to enable it. (Usually it amounts to copying the `main` lines and changing to `universe`.)
a.) All commands are supposed to be run by root. If you are logged in as a regular user with sudo rights, please prepend ___sudo___ to each of the commands.
b.) You only need to do this if you want to ___host your own Jitsi server___. If you just want to have a video conference with someone, use https://meet.jit.si instead.
## Basic Jitsi Meet install
### Add the repository
echo 'deb https://download.jitsi.org stable/' >> /etc/apt/sources.list.d/jitsi-stable.list
wget -qO - https://download.jitsi.org/jitsi-key.gpg.key | apt-key add -
I am getting an error about signatures and public key is not listed
See this error below from screen shot.
what can I do to fix this