report_mirror: 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/report_mirror - from package: mirrormanager-client

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

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