mglob: 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/mglob - from package: python-mglob

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

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