puddletag: 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/puddletag - from package: puddletag

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