Celestia

# Download OpenGPG key for validate repository signatures
$ wget https://celestiaproject.space/celestiaproject.key

# Check the downloaded key
$ gpg --keyid-format long  celestiaproject.key
gpg: WARNING: no command supplied.  Trying to guess what you mean ...
pub   rsa4096/982A4D8BCC132493 2023-11-04 [SC]
	  0CE58AD6307B38B03C681111982A4D8BCC132493
uid                           Celestia Development Team 
sub   rsa4096/9778A86030002CBE 2023-11-04 [E]

# Import the key
$ sudo apt-key add celestiaproject.key

# Update apt sources.list
$ echo "deb https://celestiaproject.space/${OS}/ ${SUITE} main" | sudo tee /etc/apt/sources.list.d/celestia.list

# If Celestia sources are required then also add
$ echo "deb-src https://celestiaproject.space/${OS}/ ${SUITE} main" | sudo tee -a /etc/apt/sources.list.d/celestia.list

# Update apt database and install Celestia
sudo apt update && sudo apt install celestia