epic4: 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/epic4 - from package: epic4

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

Error in other languages:
epic4: bevel nie gevind nie
epic4: comandă negăsită
epic4: comando não encontrado
epic4: commande introuvable
epic4: command not found
epic4: käsku ei ole
epic4: không tìm thấy lệnh
epic4: komanda nerasta
epic4: Kommando nicht gefunden.
epic4: kommandot finns inte
epic4: komut yok
epic4: nie znaleziono polecenia
epic4: níor aimsíodh an t-ordú
epic4: no se encontró la orden
epic4: no s'ha trobat l'ordre
epic4: opdracht niet gevonden
epic4: parancs nem található
epic4: perintah tidak ditemukan
epic4: príkaz nenájdený
epic4: příkaz nenalezen
epic4: команда не найдена
epic4: командата не е открита
epic4: 命令找不到
epic4: コマンドが見つかりません