edid-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/edid-decode - from package: xorg-x11-utils

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

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