dellBiosUpdate: 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/dellBiosUpdate - from package: smbios-utils-python

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

On Debian possible default full paths are:

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

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

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