gpgv: 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/gpgv - from package: gnupg2

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

On Debian possible default full paths are:

/usr/bin/gpgv - from package: gpgv

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

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