starpu_calibrate_bus: 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/starpu_calibrate_bus - from package: starpu-tools

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

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