cd-discid: command not found

Have You tried accessing the binary with the full path?

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-discid - from package: cd-discid

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

On Debian possible default full paths are:

/usr/bin/cd-discid - from package: cd-discid

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