playbucket: 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 CentOS possible default full paths are:

/usr/bin/playbucket - from package: nas

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/playbucket - from package: nas-bin

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

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