cdrwtool: 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/cdrwtool - from package: udftools

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

On Debian possible default full paths are:

/usr/bin/cdrwtool - from package: udftools

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

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