DIETtestTool: 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/DIETtestTool - from package: logcentral-tools

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

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