GenFds: 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/GenFds - from package: edk2-tools-python

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

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