Add link to learn more about installing fleetd (#25610)

#25307

changes/25307-fleetctl-package-link

@@ -0,0 +1 @@
+- Added link to information about installing fleetd when packages are generated

cmd/fleetctl/package.go

@@ -379,27 +379,29 @@ func packageCommand() *cli.Command {
 
 			path, _ = filepath.Abs(path)
 			pathBase := filepath.Base(path)
-			var installInstructions = "double-click the installer"
+			var installInstructions = "double-clicking the installer"
 			var deviceType string
 			switch c.String("type") {
 			case "pkg":
-				installInstructions += fmt.Sprintf(" or run the command `sudo installer -pkg \"%s\" -target /`", pathBase)
+				installInstructions += fmt.Sprintf(" or running the command `sudo installer -pkg \"%s\" -target /`", pathBase)
 				deviceType = "macOS"
 			case "deb":
-				installInstructions += fmt.Sprintf(" or run the command `sudo apt install \"%s\"`", pathBase)
+				installInstructions += fmt.Sprintf(" or running the command `sudo apt install \"%s\"`", pathBase)
 				deviceType = "Debian-based Linux"
 			case "rpm":
-				installInstructions += fmt.Sprintf(" or run the command `sudo dnf install \"%s\"`", pathBase)
+				installInstructions += fmt.Sprintf(" or running the command `sudo dnf install \"%s\"`", pathBase)
 				deviceType = "RPM-based Linux"
 			case "msi":
-				installInstructions += fmt.Sprintf(" or run the command `msiexec /i \"%s\"` as administrator", pathBase)
+				installInstructions += fmt.Sprintf(" or running the command `msiexec /i \"%s\"` as administrator", pathBase)
 				deviceType = "Windows"
 			}
 
 			fmt.Printf(`
 Success! You generated fleetd at %s
 
-To add a new %s device to Fleet, %s.
+To add a new %s device to Fleet, install fleetd by %s.
+
+Learn more: https://fleetdm.com/guides/enroll-hosts
 
 To add other devices to Fleet, distribute fleetd using Chef, Ansible, Jamf, or Puppet. Learn how: https://fleetdm.com/learn-more-about/enrolling-hosts
 `, path, deviceType, installInstructions)