yodl2whatever: 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/yodl2whatever - from package: yodl

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

Error in other languages:
yodl2whatever: bevel nie gevind nie
yodl2whatever: comandă negăsită
yodl2whatever: comando não encontrado
yodl2whatever: commande introuvable
yodl2whatever: command not found
yodl2whatever: käsku ei ole
yodl2whatever: không tìm thấy lệnh
yodl2whatever: komanda nerasta
yodl2whatever: Kommando nicht gefunden.
yodl2whatever: kommandot finns inte
yodl2whatever: komut yok
yodl2whatever: nie znaleziono polecenia
yodl2whatever: níor aimsíodh an t-ordú
yodl2whatever: no se encontró la orden
yodl2whatever: no s'ha trobat l'ordre
yodl2whatever: opdracht niet gevonden
yodl2whatever: parancs nem található
yodl2whatever: perintah tidak ditemukan
yodl2whatever: príkaz nenájdený
yodl2whatever: příkaz nenalezen
yodl2whatever: команда не найдена
yodl2whatever: командата не е открита
yodl2whatever: 命令找不到
yodl2whatever: コマンドが見つかりません