prolix: 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/prolix - from package: prolix

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