hypex: 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/hypex - from package: dbacl

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

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