hltest: 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 CentOS possible default full paths are:

/usr/bin/hltest - from package: gpm

You may install the required package with command yum install {package}

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