ss is not in a package called
ss. If you run:
yum provides */ss
you will be shown a list of packages that provide the
ss utility. A quick read through this will show that the package that provides
You could possibly use a website such as http://rpmfind.net/linux/RPM/index.html to search for later versions of
iptroute and install that.
The problem with this approach is that later packages will have dependencies that you don't have installed on CentOS 6. You will therefore need to install those too. After a while you'll end up with a hotchpotch system with various versions of utilities and libraries that haven't been thoroughly tested with each other which will only give you a great deal of pain, especially when you attempt an
yum update later.
An alternative is to compile it yourself. There are various resources available on the internet. You can either compile and install, or you can compile and create an RPM which you then install on your system. However, compiling will necessitate the installation of many utilities and libraries on your system if you haven't compiled before.
Another option would be to use Copr build system to compile remotely for you. You create a
iptables and send it to
copr for building. Creating a
src.rpm is relatively easy. Even easier, is editing already created
src.rpm files from other systems, such as CentOS 7 or Feodra 20. Information on
src.rpm is available from the Fedora Wiki, Fedora Docs and CentOS site and, of course, on Google.
.spec file within the
src.rpm to reflect the version of the package you want to install, remembering that a certain version of a package (such as
iproute) may well need certain version of other libraries installed. In this case, you'll end up in the same situation as if you'd downloaded the
rpm from RPM Find.net above. However, using this method gives you slightly more control.