eptex: command not found

Have You tried accessing the binary with the full path?

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/eptex - from package: texlive-binaries

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