vde_l3: 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/bin/vde_l3 - from package: vde2

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

Error in other languages:
vde_l3: bevel nie gevind nie
vde_l3: comandă negăsită
vde_l3: comando não encontrado
vde_l3: commande introuvable
vde_l3: command not found
vde_l3: käsku ei ole
vde_l3: không tìm thấy lệnh
vde_l3: komanda nerasta
vde_l3: Kommando nicht gefunden.
vde_l3: kommandot finns inte
vde_l3: komut yok
vde_l3: nie znaleziono polecenia
vde_l3: níor aimsíodh an t-ordú
vde_l3: no se encontró la orden
vde_l3: no s'ha trobat l'ordre
vde_l3: opdracht niet gevonden
vde_l3: parancs nem található
vde_l3: perintah tidak ditemukan
vde_l3: príkaz nenájdený
vde_l3: příkaz nenalezen
vde_l3: команда не найдена
vde_l3: командата не е открита
vde_l3: 命令找不到
vde_l3: コマンドが見つかりません