pepwindowall: 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/pepwindowall - from package: emboss

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

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