numbound: 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

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/numbound - from package: num-utils

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