debclean: 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/debclean - from package: devscripts

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

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