yum-debug-restore: 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-restore - from package: yum-utils

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

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