xenlockprof: 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-4.4/bin/xenlockprof - from package: xen-utils-4.4

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

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