dellBiosUpdate-compat: command not found

Have You tried accessing the binary with the full path?

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

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