comedi_calibrate: 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/comedi_calibrate - from package: libcomedi0

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

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