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Oftenly I tried adept and apt-get upgrade with different outcomings. Usually adept will suggest more upgrade options while apt-get upgrade just hints that there are something not upgraded and these information is likely to be missed if you just key "apt-get update & upgrade" as an everyday routine work. So if you are using kubuntu, I think it's a better idea to use adept other than apt-get upgrade.

Nope, you should only use adept when it's absolutely necessary. Since there is a very high risk of crash for adapt while apt-get never crashed on my computer.

Usually, you can just update everything with apt-get, and decide if you really need those things you cannot update with apt-get, then update the remaining with adept.

哈哈哈，哈哈!!!!!!!!!!

Thanks to poet. Anyway it seems apt-get does keep back some critical packages. Just as below after I installed KDE4.01 and ran upgrade once:

The following packages have been kept back:
bind9-host dnsutils language-support-writing-en libbind9-30 libisccfg30 linux-generic linux-headers-generic
linux-image-generic linux-restricted-modules-generic ssl-cert
0 upgraded, 0 newly installed, 0 to remove and 10 not upgraded.

Do not know why. But hints from apt-get tell a lot.

And what's so funny, can you share with us Professor BugMeNot?
[/quote]

lenin 写了：Thanks to poet. Anyway it seems apt-get does keep back some critical packages. Just as below after I installed KDE4.01 and ran upgrade once:
Do not know why. But hints from apt-get tell a lot.
And what's so funny, can you share with us Professor BugMeNot?

I think the "man apt-get" is very descriptive:

"New versions of currently installed packages that cannot be upgraded without changing the install status of another package will be left at their current version."

So apt-get will not upgrade those packages by default. As adept may break something after an upgrade.

btw: apt-get dist-upgrade will upgrade more packages than apt-get upgrade, you try.