qodem: 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/qodem - from package: qodem

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