Originally Posted by bikesh
thanks TBOne, jpollard, john vv, jkirchner i install rhel 7 and i find similar with rhel 6 and for exam i need to upgrade some topics such as sysdemd ...
I'm really not sure what this post means.
I have extensive experience with RHEL/CentOS-6, and I've just recently started diving into 7. Beyond the standard CLI commands, nothing is the same. The DE is different, the graphical config utilities are different, the startup files are different, the method to start/stop/restart the services is different, the method to autostart the services is different.
The difference between RHEL6 and RHEL7 is comparable to the difference between RHEL6 and any other modern Linux distro, other than the package management system. In other words, it's practically a completely different distro.