I know I can use Redhat and CentOS rpms on my CentOS 6.7/6.8 systems.
However, I feel I can only trust rpms that come from the redhat and centos web sites, or other reliable/known-to-me sites.
Now I need to install tcl, and I am not finding it.
What is the normal, reasonably secure way to find rpms, for tcl and other business apps?
(For installing Redis, I switched to building from source, because I went crazy chasing rpms)