dellMediaDirectCtl: 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/dellMediaDirectCtl - from package: smbios-utils-bin

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

On Debian possible default full paths are:

/usr/sbin/dellMediaDirectCtl - from package: smbios-utils

You may install the required package with command apt-get install {package}

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