Thread:Project:Support desk/PHP and Mysql was upgraded on my server and now I get a blank white page./reply (4)

this page seems to have a solution, but I'm confused about what "nano" means: nano Namespace.php

http://icesquare.com/wordpress/mediawiki-error-parse-error-syntax-error-unexpected-t_namespace-expecting-t_string-in-usrlocalwwwapache22datawikiincludesnamespace-php-on-line-46/

could you please explain this? does it simply mean to open the page and edit it or an I actually adding a line to Namespace.php that reads "nano Namespace.php"?

thank you!