cdrdao: 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/cdrdao - from package: cdrdao

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

On Debian possible default full paths are:

/usr/bin/cdrdao - from package: cdrdao

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

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