I had an issue with a NGINX server not starting after an upgrade, sudo nginx -t did not help.
I was faced with this:
> sudo nginx -t
nginx: [emerg] unknown "optin_login" variable
nginx: configuration file /etc/nginx/nginx.conf test failed
but optin_login was not in the config.
GREP to the help
grep -rnw '/etc/nginx' -e 'optin_login'
And tada found the exact location where this missing variable was used.
/etc/nginx/sites-available/just.kidding.not.real:31: if ($optin_login = no) {
/etc/nginx/sites-available/also.not.real:47: if ($optin_login = no) {
/etc/nginx/conf.d/map-country.conf:15:#map $geoip_country_code $optin_login {
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