tknamazu: 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/tknamazu - from package: namazu2

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