Thread:Project:Support desk/MediaWiki 1.20.5 LocalSettings.php not found

I have copied MediaWiki 1.20.5 files to my linux (RHEL 6) server. Mysql database is also created. But when I try to start MediaWiki site by typing the MediaWiki URL in the browser, it shows "LocalSettings.php not found. Please set up the wiki first." When I start following the instructions by clicking the link "set up the wiki first",Mysql option is not displayed although Sqlite option is displayed.