osmo_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/osmo_sdr - from package: osmo-sdr

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

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