vzmigrate: 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/sbin/vzmigrate - from package: vzctl

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

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