decode-edid: 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/decode-edid - from package: i2c-tools

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

On Debian possible default full paths are:

/usr/bin/decode-edid - from package: i2c-tools

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

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