repotool: 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/repotool - from package: reposurgeon

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

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