readom: 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/readom - from package: wodim

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

On Debian possible default full paths are:

/usr/bin/readom - from package: wodim

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