bnamazu: 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/bnamazu - from package: namazu2

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