cmirrord: 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/sbin/cmirrord - from package: cmirror

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

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