bwm-ng: 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 CentOS possible default full paths are:

/usr/bin/bwm-ng - from package: bwm-ng

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/bwm-ng - from package: bwm-ng

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

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