cdw: 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/cdw - from package: cdw

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

On Debian possible default full paths are:

/usr/bin/cdw - from package: cdw

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

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