cd-info: 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-info - from package: libcdio

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

On Debian possible default full paths are:

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

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

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