Thanks,amrita!  :-)
You indeed give a prompt help. :-)

On Oct 9, 6:32 am, amrita <[EMAIL PROTECTED]> wrote:
> Try running a `gem help commands`. You will get an overview of all
> things you can do with gem.
>
> Then you can do a `gem help sources` which gives the following :-)
>
> Usage: gem sources [options]
>
>   Options:
>     -a, --add SOURCE_URI             Add source
>     -l, --list                       List sources
>     -r, --remove SOURCE_URI          Remove source
>     -c, --clear-all                  Remove all sources (clear the
> cache)
>     -u, --update                     Update source cache
>
>   Common Options:
>     -h, --help                       Get help on this command
>     -V, --[no-]verbose               Set the verbose level of output
>     -q, --quiet                      Silence commands
>         --config-file FILE           Use this config file instead of
> default
>         --backtrace                  Show stack backtrace on errors
>         --debug                      Turn on Ruby debugging
>
>   Summary:
>     Manage the sources and cache file RubyGems uses to search for gems
>
>   Defaults:
>     --list
>
> Now you can add/remove any repositories from your gem sources.
>
> On Oct 7, 10:40 pm, Nikki <[EMAIL PROTECTED]> wrote:
>
> > Thank you for your feedback! :)
> > I have resolved my problem.
> > After installing the cobbler rpm ,run "rpm -ql rubygem-cobbler",and
> > the first line gives the path of rubygem-cobbler.
> > Then run "gem install cobbler path --include-denpendencies".
>
> > Another question:
> > Could you please give me some details about changing gem repository?
>
> > Thanks,
>
> > Nikki
> > On Oct 8, 2:56 am,amrita<[EMAIL PROTECTED]> wrote:
>
> > > You could use
>
> > > gem install cobbler --source <url> --include-dependencies
>
> > > where url points to the source of the cobbler gem. Make sure you have
> > > installed gem first.
>
> > > Alternately you could add the repository from where you would like gem
> > > to pull out cobbler, to the gem sources. After that do a `gem env`
> > > just to make sure that the repository is among the sources. After that
> > > running `gem install cobbler` should work.
>
> > > On Oct 6, 11:57 pm, Nikki <[EMAIL PROTECTED]> wrote:
>
> > > > Hi ALL,
> > > >   I am newcomer and also a freshman to Ruby.
> > > >   Would anyone have the experience about installing rubygem-cobbler?
> > > >   I tried to run some ruby programs.It prompts "Could not find Ruby
> > > > Gem cobbler(>= 0)(Gem::LoadError)".But I had tried "yum install" and
> > > > to download cobbler files.They all don't work.
> > > >   Would anyone give some advice?
> > > >   Thanks!
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