function vundle-init () {
  if [ ! -d ~/.vim/bundle/vundle/ ]
  then
    mkdir -p ~/.vim/bundle/vundle/
  fi

  if [ ! -d ~/.vim/bundle/vundle/.git ] && [ ! -f ~/.vim/bundle/vundle/.git ]
  then
    git clone http://github.com/gmarik/vundle.git ~/.vim/bundle/vundle
    echo "\n\tRead about vim configuration for vundle at https://github.com/gmarik/vundle\n"
  fi
}

function vundle () {
  vundle-init
  vim -c "execute \"PluginInstall\" | q | q"
}

function vundle-update () {
  vundle-init
  vim -c "execute \"PluginInstall!\" | q | q"
}

function vundle-clean () {
  vundle-init
  vim -c "execute \"PluginClean!\" | q | q"
}

function vundle-init () {
  if [ ! -d ~/.vim/bundle/vundle/ ]
  then
    mkdir -p ~/.vim/bundle/vundle/
  fi

  if [ ! -d ~/.vim/bundle/vundle/.git ] && [ ! -f ~/.vim/bundle/vundle/.git ]
  then
    git clone http://github.com/gmarik/vundle.git ~/.vim/bundle/vundle
    echo "\n\tRead about vim configuration for vundle at https://github.com/gmarik/vundle\n"
  fi
}

function vundle () {
  vundle-init
  vim -c "execute \"BundleInstall\" | q | q"
}

function vundle-update () {
  vundle-init
  vim -c "execute \"BundleInstall!\" | q | q"
}

function vundle-clean () {
  vundle-init
  vim -c "execute \"BundleClean!\" | q | q"
}

--- 
+++ 
@@ -13,15 +13,15 @@
 
 function vundle () {
   vundle-init
-  vim -c "execute \"PluginInstall\" | q | q"
+  vim -c "execute \"BundleInstall\" | q | q"
 }
 
 function vundle-update () {
   vundle-init
-  vim -c "execute \"PluginInstall!\" | q | q"
+  vim -c "execute \"BundleInstall!\" | q | q"
 }
 
 function vundle-clean () {
   vundle-init
-  vim -c "execute \"PluginClean!\" | q | q"
+  vim -c "execute \"BundleClean!\" | q | q"
 }
Use the newest Vundle commands

Vundle changed the command names during an interface update. The old commands will be deprecated. https://github.com/gmarik/Vundle.vim/blob/v0.10.2/doc/vundle.txt#L372-L396