pgpverify: 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 Debian possible default full paths are:

/usr/lib/news/bin/pgpverify - from package: inn2
/usr/lib/news/bin/pgpverify - from package: inn

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

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