bmon: 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/bmon - from package: bmon

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

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