faust2pdf: 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
/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/faust2pdf - from package: faust

You may install the required package with command apt-get install {package}
Error in other languages:
faust2pdf: bevel nie gevind nie
faust2pdf: comandă negăsită
faust2pdf: comando não encontrado
faust2pdf: commande introuvable
faust2pdf: command not found
faust2pdf: käsku ei ole
faust2pdf: không tìm thấy lệnh
faust2pdf: komanda nerasta
faust2pdf: Kommando nicht gefunden.
faust2pdf: kommandot finns inte
faust2pdf: komut yok
faust2pdf: nie znaleziono polecenia
faust2pdf: níor aimsíodh an t-ordú
faust2pdf: no se encontró la orden
faust2pdf: no s'ha trobat l'ordre
faust2pdf: opdracht niet gevonden
faust2pdf: parancs nem található
faust2pdf: perintah tidak ditemukan
faust2pdf: príkaz nenájdený
faust2pdf: příkaz nenalezen
faust2pdf: команда не найдена
faust2pdf: командата не е открита
faust2pdf: 命令找不到
faust2pdf: コマンドが見つかりません