How to install Signal Desktop messenger on Linux Lite?

Signal is very popular messenger and mostly is used like mobile phone application on mobile phones, but you can install it on your Linux desktop as well. I will show, how in install Signal desktop application on Linux Lite, which is Ubuntu-based distro and it means it uses the same repositories like Ubuntu linux.

Following Signal installation manual will work on every Debian-based linux distro.

Install Signal on Linux Lite desktop

All you need to to is to run following commands in your terminal

curl -s https://updates.signal.org/desktop/apt/keys.asc | sudo apt-key add

echo "deb [arch=amd64] https://updates.signal.org/desktop/apt xenial main" | sudo tee -a /etc/apt/sources.list.d/signal-xenial.list

sudo apt update && sudo apt install signal-desktop

output:

Hit:1 http://us.archive.ubuntu.com/ubuntu bionic InRelease                     
Hit:2 http://archive.canonical.com/ubuntu bionic InRelease                     
Hit:3 http://ppa.launchpad.net/alex-p/aegisub/ubuntu bionic InRelease          
Get:4 http://us.archive.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]  
Get:5 https://updates.signal.org/desktop/apt xenial InRelease [2,315 B]        
Hit:6 http://ppa.launchpad.net/bitcoin/bitcoin/ubuntu bionic InRelease         
Get:7 https://updates.signal.org/desktop/apt xenial/main amd64 Packages [700 B]
Hit:8 http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu bionic InRelease 
Get:9 http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]   
Hit:10 http://ppa.launchpad.net/qbittorrent-team/qbittorrent-stable/ubuntu bionic InRelease
Get:11 http://us.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Hit:12 http://ppa.launchpad.net/stebbins/handbrake-releases/ubuntu bionic InRelease
Get:13 http://us.archive.ubuntu.com/ubuntu bionic-security/main amd64 Packages [707 kB]
Hit:14 http://repo.linuxliteos.com/linuxlite diamond InRelease                 
Hit:15 http://ppa.launchpad.net/teejee2008/ppa/ubuntu bionic InRelease         
Get:16 http://us.archive.ubuntu.com/ubuntu bionic-security/main i386 Packages [464 kB]
Get:17 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages [932 kB]
Get:18 http://us.archive.ubuntu.com/ubuntu bionic-updates/main i386 Packages [675 kB]
Get:19 http://us.archive.ubuntu.com/ubuntu bionic-updates/universe i386 Packages [1,014 kB]
Get:20 http://us.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages [1,068 kB]
Fetched 5,115 kB in 29s (177 kB/s)                                             
Reading package lists... Done
Building dependency tree       
Reading state information... Done
7 packages can be upgraded. Run 'apt list --upgradable' to see them.
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  fonts-hosny-amiri fonts-sil-scheherazade linux-headers-4.15.0-88
  linux-headers-4.15.0-88-generic linux-headers-4.15.0-91
  linux-headers-4.15.0-91-generic linux-image-4.15.0-88-generic
  linux-image-4.15.0-91-generic linux-modules-4.15.0-88-generic
  linux-modules-4.15.0-91-generic linux-modules-extra-4.15.0-88-generic
  linux-modules-extra-4.15.0-91-generic
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  libappindicator1
The following NEW packages will be installed:
  libappindicator1 signal-desktop
0 upgraded, 2 newly installed, 0 to remove and 7 not upgraded.
Need to get 98.8 MB of archives.
After this operation, 336 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://us.archive.ubuntu.com/ubuntu bionic/universe amd64 libappindicator1 amd64 12.10.1+18.04.20180322.1-0ubuntu1 [19.4 kB]
Get:2 https://updates.signal.org/desktop/apt xenial/main amd64 signal-desktop amd64 1.33.4 [98.8 MB]
Fetched 98.8 MB in 8min 50s (187 kB/s)                                         
Selecting previously unselected package libappindicator1.
(Reading database ... 417609 files and directories currently installed.)
Preparing to unpack .../libappindicator1_12.10.1+18.04.20180322.1-0ubuntu1_amd64.deb ...
Unpacking libappindicator1 (12.10.1+18.04.20180322.1-0ubuntu1) ...
Selecting previously unselected package signal-desktop.
Preparing to unpack .../signal-desktop_1.33.4_amd64.deb ...
Unpacking signal-desktop (1.33.4) ...
Setting up libappindicator1 (12.10.1+18.04.20180322.1-0ubuntu1) ...
Setting up signal-desktop (1.33.4) ...
Processing triggers for desktop-file-utils (0.23-1ubuntu3.18.04.2) ...
Processing triggers for libc-bin (2.27-3ubuntu1) ...
Processing triggers for gnome-menus (3.13.3-11ubuntu1.1) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for mime-support (3.60ubuntu1) ...