yodl2txt: 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/yodl2txt - from package: yodl

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

Error in other languages:
yodl2txt: bevel nie gevind nie
yodl2txt: comandă negăsită
yodl2txt: comando não encontrado
yodl2txt: commande introuvable
yodl2txt: command not found
yodl2txt: käsku ei ole
yodl2txt: không tìm thấy lệnh
yodl2txt: komanda nerasta
yodl2txt: Kommando nicht gefunden.
yodl2txt: kommandot finns inte
yodl2txt: komut yok
yodl2txt: nie znaleziono polecenia
yodl2txt: níor aimsíodh an t-ordú
yodl2txt: no se encontró la orden
yodl2txt: no s'ha trobat l'ordre
yodl2txt: opdracht niet gevonden
yodl2txt: parancs nem található
yodl2txt: perintah tidak ditemukan
yodl2txt: príkaz nenájdený
yodl2txt: příkaz nenalezen
yodl2txt: команда не найдена
yodl2txt: командата не е открита
yodl2txt: 命令找不到
yodl2txt: コマンドが見つかりません