drumstick-timertest: 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/drumstick-timertest - from package: drumstick-tools

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

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