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As an update for my original post, I have found the CentOS 7 installer to be MUCH more stable and easier to use when run from within a live environment. Unlike the standalone installer, when the install process is started from within a live session it does auto-detect the network interface, set up NTP automatically, the boot loader is enabled by default, and the disk partitioner doesn't fatally crash every 2 minutes.
I've since abandoned the standard DVD iso, and instead use the Gnome Live iso and install from in the live session. This says nothing of systemd, gnome 3, etc., but at least the installation process works correctly this way.
I found the partitioner to be confusing, and network set up to be impossible. I wanted a static IP address, but the installer would not seem to allow it. I set up the network manually, but the button to complete the settings was always greyed out.
I spent all day yesterday getting the system set up the way I wanted it. I feel like I should learn to use Gnome Classic, since the standard being forced on us. But I hate Gnome Classic too much. Gnome Classic is too slow, too many unwanted features, and I cannot put icons in the task bar. I use MATE.
This morning I go to boot the system, and it won't work. Every rescue attempt has failed. Yeah, this is just what is needed for the enterprise.
An entire day of work wasted. I will make one more attempt to re-install, then give up. Salix 14.1 looks pretty good.
Over a year after I started using CentOS 7 on some of the servers I admin, my opinion of it has only gotten worse.
I made the mistake of installing it on my work laptop, hoping that it would provide a nice stable work environment that I wouldn't have to reinstall for a long time. Huge disappointment.
All kinds of things are broken. Things that I'd never had an issue with in any other distribution, including Fedora, don't work. The package availability actually seems to have shrunk since CentOS 6.
This is supposed to be the third incremental release of a rock-solid stable distribution and it's like beta software. At least on the desktop. On the server side, the update from 7.0 to 7.1 was so bad, that I had to reinstall some of our servers to get them working again. Part of this was caused because the base packages in the install DVD were different from those in the base repository.
From what I've seen on bugzilla, these issues are present in RHEL as well. What was Redhat thinking?
My opinion hasn't improved much either. Since setting up my workstation on 7 a little over a year ago, I've had to format and reinstall two separate times.
One because a sudden power outage corrupted the XFS filesystem beyond repair. Who on earth thought it was a good idea to use XFS as the default filesystem on a server OS? XFS is horrible, I've never seen a more failure-prone filesystem in my life. Any hiccup in the power supply has a very reasonable chance of borking your entire filesystem and forcing you to format and reinstall. Why does it even have a journal? It apparently doesn't use it.
The second reinstall was because stupid me decided to install exfat driver support so I could access an external drive. This seemingly harmless (and successful, by the way) driver install locked up the system, and on reboot wouldn't stop kernel panicking. I tried dropping back to previous kernels, no dice, nothing would boot, the system was hosed. Even uninstalling the driver didn't help.
I have CentOS on a workstation as well, have few CentOS kernels to choose from when booting, normal thing with the updates... and then each new update rendered one of the kernels unbootable (fails to mount /sysroot, oh what an upgrade). Out of 6 kernels on the menu, 3 are already unbootable.
I don't have a lot of experience with Linux, but I would choose CentOS 6.7 over 7. I tried 7 on an old Athlon PC I was going to use as a server and when I tried looking for help with problems, most posts I found were for 5 or 6 which differed too much with 7 to be useful. So when I got the new (old) Dell OptiPlex to replace the Athlon, I installed CentOS 6.7 instead. Never looked back.
To be more specific, I remember a change from iptables to firewalld in CentOS 7 which was harder to find help for because of how new it was. (Although it's probably a bad example as it is inherited from RHEL)
In my opinion it isn't wise to change a less widely used OS too much. People on the new system will find it a lot more difficult to find help.