several time ago some website in nginx web server has annoying error cuRL error 6: Couldn’t resolve host ‘downloads.wordpress.org’. i have been search in google and not found anything.
This is Solution for cuRL error 6: Couldn’t resolve host ‘downloads.wordpress.org’
login to your server. you can do with CLI or putty. dont forget to login as root
restart your webserver in my case use nginx so i write service nginx restart
restart your panel gui in my case use webuzo so i write service webuzo restart
read also another fix error page not found