rvcd: 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/rvcd - from package: vtgrab

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

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