tunes2pod: command not found

Have You tried accessing the binary with the full path?

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/tunes2pod - from package: gnupod-tools

You may install the required package with command apt-get install {package}
Error in other languages:
tunes2pod: bevel nie gevind nie
tunes2pod: comandă negăsită
tunes2pod: comando não encontrado
tunes2pod: commande introuvable
tunes2pod: command not found
tunes2pod: käsku ei ole
tunes2pod: không tìm thấy lệnh
tunes2pod: komanda nerasta
tunes2pod: Kommando nicht gefunden.
tunes2pod: kommandot finns inte
tunes2pod: komut yok
tunes2pod: nie znaleziono polecenia
tunes2pod: níor aimsíodh an t-ordú
tunes2pod: no se encontró la orden
tunes2pod: no s'ha trobat l'ordre
tunes2pod: opdracht niet gevonden
tunes2pod: parancs nem található
tunes2pod: perintah tidak ditemukan
tunes2pod: príkaz nenájdený
tunes2pod: příkaz nenalezen
tunes2pod: команда не найдена
tunes2pod: командата не е открита
tunes2pod: 命令找不到
tunes2pod: コマンドが見つかりません