makeppgraph: 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

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/makeppgraph - from package: makepp

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