faust2graphviewer: 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/faust2graphviewer - from package: faust

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

Error in other languages:
faust2graphviewer: bevel nie gevind nie
faust2graphviewer: comandă negăsită
faust2graphviewer: comando não encontrado
faust2graphviewer: commande introuvable
faust2graphviewer: command not found
faust2graphviewer: käsku ei ole
faust2graphviewer: không tìm thấy lệnh
faust2graphviewer: komanda nerasta
faust2graphviewer: Kommando nicht gefunden.
faust2graphviewer: kommandot finns inte
faust2graphviewer: komut yok
faust2graphviewer: nie znaleziono polecenia
faust2graphviewer: níor aimsíodh an t-ordú
faust2graphviewer: no se encontró la orden
faust2graphviewer: no s'ha trobat l'ordre
faust2graphviewer: opdracht niet gevonden
faust2graphviewer: parancs nem található
faust2graphviewer: perintah tidak ditemukan
faust2graphviewer: príkaz nenájdený
faust2graphviewer: příkaz nenalezen
faust2graphviewer: команда не найдена
faust2graphviewer: командата не е открита
faust2graphviewer: 命令找不到
faust2graphviewer: コマンドが見つかりません