epigrass: 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/epigrass - from package: epigrass

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

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