When running ‘apt update’ on Ubuntu 18.04 to prepare for routine system patching, the system kicked back the following error.
N: Skipping acquire of configured file 'nginx/binary-i386/Packages' as repository 'http://nginx.org/packages/ubuntu bionic InRelease' doesn't support architecture 'i386'
The issue is that the existing sources list file for NGINX has gone stale, and appears to be requesting the i386 package. NGINX does not support i386 on Ubuntu 18.04 (Bionic). The solution is to update the sources list file for NGINX.
deb http://nginx.org/packages/ubuntu bionic nginx
deb [arch=amd64] http://nginx.org/packages/mainline/ubuntu/ bionic nginx
After this change, the error should be gone when running ‘apt update’.
For More Information
NGINX update issue (Ubuntu 18.04 Bionic) – Vesta Control Panel Forum
Ubuntu Server 18.04 Nginx i386 – StackOverflow