QSO: 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/QSO - from package: morse

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

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