yum-debug-dump: 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/yum-debug-dump - from package: yum-utils

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

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