faust2graph: 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/faust2graph - from package: faust

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

Error in other languages:
faust2graph: bevel nie gevind nie
faust2graph: comandă negăsită
faust2graph: comando não encontrado
faust2graph: commande introuvable
faust2graph: command not found
faust2graph: käsku ei ole
faust2graph: không tìm thấy lệnh
faust2graph: komanda nerasta
faust2graph: Kommando nicht gefunden.
faust2graph: kommandot finns inte
faust2graph: komut yok
faust2graph: nie znaleziono polecenia
faust2graph: níor aimsíodh an t-ordú
faust2graph: no se encontró la orden
faust2graph: no s'ha trobat l'ordre
faust2graph: opdracht niet gevonden
faust2graph: parancs nem található
faust2graph: perintah tidak ditemukan
faust2graph: príkaz nenájdený
faust2graph: příkaz nenalezen
faust2graph: команда не найдена
faust2graph: командата не е открита
faust2graph: 命令找不到
faust2graph: コマンドが見つかりません