parl: 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/parl - from package: libpar-packer-perl

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

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