miri_sdr: 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/miri_sdr - from package: miri-sdr

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

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