yodl2man: 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/yodl2man - from package: yodl

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

Error in other languages:
yodl2man: bevel nie gevind nie
yodl2man: comandă negăsită
yodl2man: comando não encontrado
yodl2man: commande introuvable
yodl2man: command not found
yodl2man: käsku ei ole
yodl2man: không tìm thấy lệnh
yodl2man: komanda nerasta
yodl2man: Kommando nicht gefunden.
yodl2man: kommandot finns inte
yodl2man: komut yok
yodl2man: nie znaleziono polecenia
yodl2man: níor aimsíodh an t-ordú
yodl2man: no se encontró la orden
yodl2man: no s'ha trobat l'ordre
yodl2man: opdracht niet gevonden
yodl2man: parancs nem található
yodl2man: perintah tidak ditemukan
yodl2man: príkaz nenájdený
yodl2man: příkaz nenalezen
yodl2man: команда не найдена
yodl2man: командата не е открита
yodl2man: 命令找不到
yodl2man: コマンドが見つかりません