【Ubuntu升级报错】“the following signatures couldn’t be verified because the public key is not available”
升级Python时第一步apt-getupdate报错报错界面报错界面在ubuntu中运行apt-getupdate时,有时会出现如下报错ubuntu@ubuntu-virtual-machine:~$sudoaptupdate[sudo]passwordforubuntu:Get:1http://dl.google.com/linux/chrome/debstableInRelease[1,81