parole: 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/parole - from package: parole

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