centrino-decode: 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/centrino-decode - from package: cpufrequtils

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

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