hyakux11: 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/hyakux11 - from package: vflib3-bin

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

Error in other languages:
hyakux11: bevel nie gevind nie
hyakux11: comandă negăsită
hyakux11: comando não encontrado
hyakux11: commande introuvable
hyakux11: command not found
hyakux11: käsku ei ole
hyakux11: không tìm thấy lệnh
hyakux11: komanda nerasta
hyakux11: Kommando nicht gefunden.
hyakux11: kommandot finns inte
hyakux11: komut yok
hyakux11: nie znaleziono polecenia
hyakux11: níor aimsíodh an t-ordú
hyakux11: no se encontró la orden
hyakux11: no s'ha trobat l'ordre
hyakux11: opdracht niet gevonden
hyakux11: parancs nem található
hyakux11: perintah tidak ditemukan
hyakux11: príkaz nenájdený
hyakux11: příkaz nenalezen
hyakux11: команда не найдена
hyakux11: командата не е открита
hyakux11: 命令找不到
hyakux11: コマンドが見つかりません