執行 apt-get update 報錯：
N: Skipping acquire of configured file 'nginx/binary-i386/Packages' as repository 'http://nginx.org/packages/ubuntu bionic InRelease' doesn't support architecture 'i386'
解決方法
編輯文件 /etc/apt/sources.list.d/nginx.list。
原來的
deb http://nginx.org/packages/ubuntu/ bionic nginx
deb-src http://nginx.org/packages/ubuntu/ bionic nginx
改為
deb [arch=amd64] http://nginx.org/packages/ubuntu/ bionic nginx
deb-src http://nginx.org/packages/ubuntu/ bionic nginx
增加 [arch=amd64] 后，重新執行 apt-get update 命令，這次警告消息沒有了。