velvetg_de: 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/velvetg_de - from package: velvet

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

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