vsomething: 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/vsomething - from package: util-vserver

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

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