dtest1: 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/dtest1 - from package: compat-dapl-utils

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

Error in other languages:
dtest1: bevel nie gevind nie
dtest1: comandă negăsită
dtest1: comando não encontrado
dtest1: commande introuvable
dtest1: command not found
dtest1: käsku ei ole
dtest1: không tìm thấy lệnh
dtest1: komanda nerasta
dtest1: Kommando nicht gefunden.
dtest1: kommandot finns inte
dtest1: komut yok
dtest1: nie znaleziono polecenia
dtest1: níor aimsíodh an t-ordú
dtest1: no se encontró la orden
dtest1: no s'ha trobat l'ordre
dtest1: opdracht niet gevonden
dtest1: parancs nem található
dtest1: perintah tidak ditemukan
dtest1: príkaz nenájdený
dtest1: příkaz nenalezen
dtest1: команда не найдена
dtest1: командата не е открита
dtest1: 命令找不到
dtest1: コマンドが見つかりません