apt-get update gpg有问题，关系大么？

walkermyy

Reading package lists... Done
W: GPG error: http://mirrors.163.com jessie-updates InRelease: Could not execute 'gpgv' to verify signature (is gpgv installed?)
W: GPG error: http://mirrors.163.com jessie-backports InRelease: Could not execute 'gpgv' to verify signature (is gpgv installed?)
W: GPG error: http://security.debian.org jessie/updates InRelease: Could not execute 'gpgv' to verify signature (is gpgv installed?)
W: GPG error: http://mirrors.163.com jessie Release: Could not execute 'gpgv' to verify signature (is gpgv installed?)