nginx: [emerg] bind() to [::]:80 failed (98: Address already in use) code example

Example 1: nginx: [emerg] bind() to 0.0.0.0:8080 failed (48: Address already in use)

sudo launchctl unload -w /System/Library/LaunchDaemons/org.apache.httpd.plist

Example 2: nginx: [emerg] bind() to [::]:4433 failed (13: Permission denied)

semanage port -a -t http_port_t  -p tcp 8090