edac-ctl: 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/edac-ctl - from package: edac-utils

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

On Debian possible default full paths are:

/usr/sbin/edac-ctl - from package: edac-utils

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