請教一個 APT 的錯誤訊息~~~

[Lost-Angel]

請教一下各位前輩們，小生的系統是 Debian Unstable ，在執行 apt-get update 的時候出現了以下的錯誤訊息，這些到底是什麼意思呢??? 到底該怎麼解決才好呢??? 煩請各位前輩指點一下不才的小生喔，非常的感謝各位!!!

Ign http://apt.debian.org.tw unstable Release.gpg
Ign http://apt.debian.org.tw unstable Release
Hit http://apt.debian.org.tw unstable/main Packages
Get:1 http://debian.linux.org.tw unstable Release.gpg [189B]
Hit http://debian.linux.org.tw unstable Release
Ign http://debian.linux.org.tw unstable Release
Hit http://debian.linux.org.tw unstable/main Packages
Hit http://debian.linux.org.tw unstable/contrib Packages
Hit http://debian.linux.org.tw unstable/non-free Packages
Get:2 http://opensource.nchc.org.tw unstable Release.gpg [197B]
Hit http://opensource.nchc.org.tw unstable Release
Ign http://opensource.nchc.org.tw unstable Release
Hit http://opensource.nchc.org.tw unstable/main Packages
Hit http://opensource.nchc.org.tw unstable/contrib Packages
Hit http://opensource.nchc.org.tw unstable/non-free Packages
Ign http://dl.sourceforge.net ./ Release.gpg
Ign http://dl.sourceforge.net ./ Release
Hit http://dl.sourceforge.net ./ Packages
Fetched 386B in 2s (137B/s)
Reading package lists...
W: GPG error: http://debian.linux.org.tw unstable Release: Could not execute /usr/bin/gpgv to verify signature (is gnupg installed?)
W: GPG error: http://opensource.nchc.org.tw unstable Release: Could not execute /usr/bin/gpgv to verify signature (is gnupg installed?)
W: You may want to run apt-get update to correct these problems

[moto]

請先確認系統是否有安裝 gnupg:

代碼: 選擇全部

dpkg -l | grep gnupg


如果沒有請安裝它

代碼: 選擇全部

apt-get install gnupg