diff --git a/ubuntu.sh b/ubuntu.sh
index 54b9902..4a1e9b1 100755
--- a/ubuntu.sh
+++ b/ubuntu.sh
@@ -27,6 +27,19 @@ if [ "$first" != 1 ];then
     proot --link2symlink tar -xf $cur/ubuntu.tar.gz --exclude='dev'||:
     echo "fixing nameserver, otherwise it can't connect to the internet"
     echo "nameserver 8.8.8.8" > etc/resolv.conf
+    stubs=()
+    stubs+=('usr/sbin/groupadd')
+    stubs+=('usr/sbin/groupdel')
+    stubs+=('usr/bin/groups')
+    stubs+=('usr/sbin/useradd')
+    stubs+=('usr/sbin/usermod')
+    stubs+=('usr/sbin/userdel')
+    stubs+=('usr/bin/chage')
+    stubs+=('usr/bin/mesg')
+    for f in ${stubs[@]};do
+        echo "Writing stub: $f"
+        echo -e "#!/bin/sh\nexit" > "$f"
+    done
     cd $cur
 fi
 mkdir -p binds