check_calib: 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/check_calib - from package: pyfai

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

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