pepcoil: 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/pepcoil - from package: emboss

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

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