vrsetup: 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/vrsetup - from package: util-vserver

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

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