gpgconf: 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/gpgconf - from package: gnupg2

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

On Debian possible default full paths are:

/usr/bin/gpgconf - from package: gnupg2

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

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