Fix return closes

quick-installer.sh

@@ -10,17 +10,17 @@ install_sudo() {
 
         echo ">>> Installing sudo package..." >&2
         apt install sudo -qq
-        return 0
+        echo 0
     fi
     
     echo ">>> No supported package manager detected, exciting..." >&2
-    return 1
+    echo 1
 }
 
 check_privilege() {
     if ! [ $(id -u) = 0 ]; then
         echo ">>> Please run as root" >&2
-        return 1
+        echo 1
     fi
 }
 
@@ -29,10 +29,10 @@ check_sudo_installation() {
 
     if ! [ $? = 0 ]; then
         echo ">>> Sudo package missing..." >&2
-        return $(install_sudo)
+        echo $(install_sudo)
     fi
 
-    return 0
+    echo 0
 }
 
 create_default_user() {