On Tue, Apr 14, 2009 at 10:31 AM, Jeffrey Cao <jcao.li...@gmail.com> wrote: > On 2009-04-14, 明覺 <shi.min...@gmail.com> wrote: >> 2009/4/14 David Fox <dfox94...@gmail.com>: >>> On Mon, Apr 13, 2009 at 4:13 PM, 明覺 <shi.min...@gmail.com> wrote: >>>> I often see that some packages are "kept back" when I do "apt-get >>>> upgrade", what does it mean? what actions are done to those kept back >>>> packages? thanks >>> >>> They're put on temporary hold. "Kept back" means that there exists a >>> dependency on one or more of the kept back packages that prevent them >>> from being installed. >>> >>> Sometimes you can upgrade them by doing a dist-upgrade or >>> full-upgrade, but you have to be careful. >> if i do the dist-upgrade or full-upgrade to force upgrade these >> packages, then i may break the dependency of some other packages, >> which depend on the old versions, right? thanks. > > No, you'll not break the dependency. > If the package to update depends on a new package, then the package will be > kept back when you use "apt-get update". > "apt-get update" will not install new packages or remove un-needed packages > automatically. "apt-get dist-upgrade" solves this issue. If the currently installed version of a "kept back" package doesn't exist any more in debian source package library, and only new version of the package exists, apt-get upgrade still won't install new packages and remove un-needed packages? thanks.
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