On Mon, Mar 28, 2011 at 22:26, Florian Philipp <li...@binarywings.net> wrote: > > Am 28.03.2011 16:50, schrieb Pandu Poluan: > > Hello list! > > > > Please bear awhile with the Gento n00b here... > > > > If I have a package 'xyz-1.1.0' already installed, and there's a newer > > 'xyz-1.2.0', what's the difference between 'emerge --update xyz' and > > 'emerge xyz'? > > > > The latter I saw also pulled in and installed the latest version. So, > > I am confused as to the difference. > > > > Thank you for your explanation. > > > > Rgds, > > > > > > A simple `emerge xyz` re-emerges xyz even if no update is necessary. > > Additionally, it adds the package xyz to your @world set. That is a list > of packages that you want to keep. If xyz has been installed only > because it is a dependency of another package and it is not part of > @world, `emerge --depclean` would uninstall the package when it is no > longer needed. > > As an example: > Lets say, you install gnome-base/gnome. This will pull in all kinds of > packages (the whole Gnome desktop environment). Now you decide to remove > gnome. Then you can call `emerge --depclean gnome` to remove gnome > itself and then `emerge --depclean` to get rid of everything else that > is no longer needed. > > If you want to re-emerge a package no matter if there is an update or > not but you do not want to add it to your @world set, call `emerge > --oneshot xyz` or shorter: `emerge -1 xyz`. For example, this is > necessary if xyz is a kernel module and you just installed ner kernel > sources. > > A few notes: > Your @world set is contained in /var/lib/portage/world. You can edit > this file directly to remove or add packages. > > `emerge --depclean <package>` only removes the package if it is no > longer needed by other packages. This is safer than calling `emerge > --clean <package>`. > > Do not call `emerge --depclean` on its own. Call `emerge --ask --verbose > --depclean` or shorter `emerge -avc`. Check all packages to make sure > you do not remove anything you still need, for example portage itself. > > If you call `emerge --pretend --verbose --depclean <package>` (short: > `emerge -pvc <package>`), portage will print a list of packages that > depend on the package you gave as a parameter. This is more accurate > than for example `equery depends <package>`. > > Hope this helps, > Florian Philipp >
Thanks! Very clear explanation, and very helpful! Rgds, -- Pandu E Poluan ~ IT Optimizer ~ Visit my Blog: http://pepoluan.posterous.com
