diff --git a/src/applications/config/view/PhabricatorSetupIssueView.php b/src/applications/config/view/PhabricatorSetupIssueView.php
--- a/src/applications/config/view/PhabricatorSetupIssueView.php
+++ b/src/applications/config/view/PhabricatorSetupIssueView.php
@@ -76,16 +76,16 @@
         'You can usually install a PHP extension using %s or %s. Common '.
         'package names are %s or %s. Try commands like these:',
         phutil_tag('tt', array(), 'apt-get'),
-        phutil_tag('tt', array(), 'yum'),
+        phutil_tag('tt', array(), 'dnf'),
         hsprintf('<tt>php-<em>%s</em></tt>', pht('extname')),
-        hsprintf('<tt>php5-<em>%s</em></tt>', pht('extname')));
+        hsprintf('<tt>php-<em>%s</em></tt>', pht('extname')));
 
       // TODO: We should do a better job of detecting how to install extensions
       // on the current system.
       $install_commands = hsprintf(
-        "\$ sudo apt-get install php5-<em>extname</em>  ".
+        "\$ sudo apt-get install php-<em>extname</em>  ".
         "# Debian / Ubuntu\n".
-        "\$ sudo yum install php-<em>extname</em>       ".
+        "\$ sudo dnf install php-<em>extname</em>       ".
         "# Red Hat / Derivatives");
 
       $fallback_info = pht(