Official Ubuntu PPA
Starting with version 5.12.3, Insomnia can now be installed through an official PPA on Ubuntu-based operating systems. Follow these simple instructions to add the repository and install the app.
# Add to sources
echo "deb https://dl.bintray.com/getinsomnia/Insomnia /" \
| sudo tee -a /etc/apt/sources.list.d/insomnia.list
# Add public key used to verify code signature
wget --quiet -O - https://insomnia.rest/keys/debian-public.key.asc \
| sudo apt-key add -
# Refresh repository sources and install Insomnia
sudo apt-get update
sudo apt-get install insomnia