nona: command not found

Have You tried accessing the binary with the full path?

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/nona - from package: hugin-tools

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