cd-paranoia: 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/cd-paranoia - from package: libcdio

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

On Debian possible default full paths are:

/usr/bin/cd-paranoia - from package: libcdio-utils

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

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