iep: 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/iep - from package: emboss

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

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