epminstall: 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/epminstall - from package: epm

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

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