bespin: 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/bespin - from package: kde-style-bespin

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

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