You can install Rails in a Fedora system with these commands…

yum -y install ruby ruby-devel ruby-irb ruby-libs ruby-rdoc ruby-ri rubygems
sudo gem update
sudo gem install rails --include-dependencies

If you are getting a ‘Can’t locate CPAN.pm in @INC’ error while opening cpan, you have not installed Bundle::Cpan. You can do that without Cpan - using yum

yum install perl-CPAN

This will install an RPM, and try to resolve all the dependencies for you using your repositories.

yum localinstall package_name.rpm

Use this command to remove a rpm package.

yum remove package_name

List all packages installed on the system

yum list

Show space used by rpm packages installed sorted by size (fedora, redhat and like)

rpm -q -a --qf "%10{SIZE}\t%{NAME}\n" | sort -k1,1n

RAR Support in Linux is easy - just install the unrar tool…

sudo yum install unrar

Installing the dependencies for HTML Validator extension for Firefox on linux.

sudo yum install compat-libstdc++-296 compat-libstdc++-33 tidy

Clears the yum cache

yum clean all

Installing Rhino(Javascript interpreter created in java) on Fedora 7

sudo yum install rhino-manual rhino-demo rhino