https://nginx.org/en/linux_packages.html#Ubuntu
Install the prerequisites:
sudo apt install curl gnupg2 ca-certificates lsb-release ubuntu-keyring
Import an official nginx signing key so apt could verify the packages authenticity. Fetch the key:
curl https://nginx.org/keys/nginx_signing.key | gpg --dearmor \
| sudo tee /usr/share/keyrings/nginx-archive-keyring.gpg >/dev/null
Verify that the downloaded file contains the proper key:
gpg --dry-run --quiet --no-keyring --import --import-options import-show /usr/share/keyrings/nginx-archive-keyring.gpg
To set up the apt repository for stable nginx packages, run the following command:
echo "deb [signed-by=/usr/share/keyrings/nginx-archive-keyring.gpg] \
https://nginx.org/packages/ubuntu `lsb_release -cs` nginx" \
| sudo tee /etc/apt/sources.list.d/nginx.list
If you would like to use mainline nginx packages, run the following command instead:
echo "deb [signed-by=/usr/share/keyrings/nginx-archive-keyring.gpg] \
https://nginx.org/packages/mainline/ubuntu `lsb_release -cs` nginx" \
| sudo tee /etc/apt/sources.list.d/nginx.list
Set up repository pinning to prefer our packages over distribution-provided ones:
echo -e "Package: *\nPin: origin nginx.org\nPin: release o=nginx\nPin-Priority: 900\n" \
| sudo tee /etc/apt/preferences.d/99nginx
To install nginx, run the following commands:
sudo apt update sudo apt install nginx