gtimer: 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/gtimer - from package: gtimer

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

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