biosdecode: 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/biosdecode - from package: dmidecode

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

On Debian possible default full paths are:

/usr/sbin/biosdecode - from package: dmidecode

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

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