xen-toolstack-wrapper: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/lib/xen-common/bin/xen-toolstack-wrapper - from package: xen-utils-common

You may install the required package with command apt-get install {package}

Error in other languages:
xen-toolstack-wrapper: bevel nie gevind nie
xen-toolstack-wrapper: comandă negăsită
xen-toolstack-wrapper: comando não encontrado
xen-toolstack-wrapper: commande introuvable
xen-toolstack-wrapper: command not found
xen-toolstack-wrapper: käsku ei ole
xen-toolstack-wrapper: không tìm thấy lệnh
xen-toolstack-wrapper: komanda nerasta
xen-toolstack-wrapper: Kommando nicht gefunden.
xen-toolstack-wrapper: kommandot finns inte
xen-toolstack-wrapper: komut yok
xen-toolstack-wrapper: nie znaleziono polecenia
xen-toolstack-wrapper: níor aimsíodh an t-ordú
xen-toolstack-wrapper: no se encontró la orden
xen-toolstack-wrapper: no s'ha trobat l'ordre
xen-toolstack-wrapper: opdracht niet gevonden
xen-toolstack-wrapper: parancs nem található
xen-toolstack-wrapper: perintah tidak ditemukan
xen-toolstack-wrapper: príkaz nenájdený
xen-toolstack-wrapper: příkaz nenalezen
xen-toolstack-wrapper: команда не найдена
xen-toolstack-wrapper: командата не е открита
xen-toolstack-wrapper: 命令找不到
xen-toolstack-wrapper: コマンドが見つかりません