iperl: 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/iperl - from package: libapp-repl-perl

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

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