makeppclean: 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/makeppclean - from package: makepp

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

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