~ sudo apt update
Hit:1 http://mirrors.163.com/debian testing InRelease
Hit:2 http://mirrors.163.com/debian testing-updates InRelease
Hit:3 http://security.debian.org stable/updates InRelease
Reading package lists... Done
Building dependency tree
Reading state information... Done
1 package can be upgraded. Run 'apt list --upgradable' to see it.
查看得知:
~ sudo apt list --upgradable -a
Listing... Done
firefox-esr/stable 52.4.0esr-1~deb9u1 amd64 [upgradable from: 52.3.0esr-2]
firefox-esr/testing,now 52.3.0esr-2 amd64 [installed,upgradable to: 52.4.0esr-1~deb9u1]
升级却不无法更新:
~ sudo apt dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
请教各位这是什么原因。