cdparanoia: 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/cdparanoia - from package: cdparanoia

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

On Debian possible default full paths are:

/usr/bin/cdparanoia - from package: cdparanoia

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

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