Showing posts with label CentOS. Show all posts
Showing posts with label CentOS. Show all posts

2015-01-04

Featured Comments: Week of 2014 December 28

Happy new year 2015! This past week, there were two comments on one post. I will repost both of those.

Review: CentOS 7.0 GNOME

An anonymous reader said, "Both CentOS and Scientific are straighforward recompilations of RHEL, with trademarks, logos, etc., removed. It's no surprise you found them much alike, because they are essentially identical. Flash and any other closed source non-FOSS products violate Red Hat's policy on FOSS, and leave it -- and the customers it indemnifies -- vulnerable to law suits. Ditto CentOS and Fedora. While RHEL/CentOS can be tweaked to make it an acceptable desktop (at least for my purposes) both are quite obviously enterprise products, and marketed as such."
Commenter Kamlesh Sheth had a suggestion (which I had already tried): "you can easily tweak centos to delight by following www.dedoimedo.com".

Thanks to both of those folks for commenting on that post. I am back at Princeton now to take my final exams this month and start research for real. Again, this means that my post frequency will be at least once per month, but I can't guarantee a higher frequency than that, and I can't guarantee specifically what I will post. Anyway, if you like what I write, please continue subscribing and commenting!

2014-12-29

Review: CentOS 7.0 GNOME

A little over two months ago, I reviewed Scientific Linux 7.0 GNOME. The results weren't too pretty. A commenter on that post suggested that I try CentOS 7 to see if the problems are related to the whole Red Hat Enterprise Linux (RHEL)/CentOS 7 family or to Scientific Linux 7 specifically. This review aims to do exactly that.

For those who don't remember, CentOS is essentially the free (as in beer) community branch of RHEL. It used to be a separate distribution whose developers took great pains to expunge any mention of RHEL from every part of the distribution, as they did not want to officially license the RHEL trademark. Now, though, CentOS is officially part of RHEL, which should hopefully make life a bit easier for the CentOS developers.

I tried CentOS 7.0 GNOME on a live USB made with UnetBootin. Follow the jump to see what it's like. (As will become clear soon enough, there are no pictures in this review, and for the same reason, this review will be relatively shorter. Suffice it to say for now that the distribution basically looks identical to Scientific Linux 7.0 GNOME from screenshots.)

2012-08-06

Review: Stella 6.3

Main Screen
A couple weeks ago on an unrelated review, I remember a commenter asking if I could review a Linux distribution called Stella. It seemed interesting, but I didn't think much of it until the last few days when its release of version 6.3 made news on several major Linux news sites. At that point I knew I should check it out, so here it is. (Also, if Tennessee Williams were alive today, I think that "A Linux Distribution Named 'Stella'" would have made a great title for one of his plays. Yes, I really did have to make that pun, and it won't be the last time either.)

A lot of distributions that I come across that aim like Stella to be more user-friendly than their respective parent distributions are based on Ubuntu. There are quite a few based straight on Debian. There are also a handful based on Slackware, Arch, or Gentoo, which are all generally not very easy for new Linux users to use. And there are a few based on Fedora, though I feel like the only big-name one that's still around is Kororaa (and even that was originally based on Gentoo, so it hasn't been based on Fedora for that long — plus, Fuduntu forked from Fedora a while ago, while I haven't heard anything about Fusion recently). But until now, I don't think I've ever heard of a distribution that aims to make straight-up RHEL/CentOS more user-friendly, and that is exactly what Stella aims to do, so I think it may be unique in that regard. This is a great thing, because while I don't think CentOS is particularly unfriendly to general consumers, I do think it is generally geared more towards enterprise desktop and server settings. But CentOS has a reputation of being absolutely rock-solid, and this is made better by the fact that every CentOS release is supported for 7 years (and RHEL provides an additional 3 years of support to paying customers on top of that, if I remember correctly). So that seems like an ideal starting point upon which to build a user-friendly desktop.

I tested Stella 6.3 as a live USB system made with UnetBootin. (I tested the 32-bit edition because I happily have a new installed system, so I'm not looking for anything anymore so I don't really need the 64-bit edition. This also means that as before, from now on all reviews are of the 32-bit edition unless I specify otherwise.) Follow the jump to see how Stanley reacts. (Yes, I did that pun again.)

2011-08-07

Featured Comments: Week of 2011 July 31

There were a few posts that got a handful of comments, so I'll try to repost a few from each.

Review: CentOS 6.0

Reader MIchael J King had a clarification countering one of my gripes: "The Live DVD of CentOS 6 has the special effects you were craving plus many many more applications including kde ones. On my Thinkpad T61 it runs perfectly and is very stable with support to 2016 and beyond."
An anonymous commenter supported my conclusion: "Except for a few nits, CentOS6 and Scientific Linux 6 should be identical. They have been in my testing (for server use). Why anyone would choose CentOS over SL after the repeated delays in updates (for both versions 5 and 6) in the last couple of years is a complete mystery to me. Scientific Linux is also free, is updated more frequently, and is supported by CERN and Fermi National Lab. No contest."
Reader Troy Dawson, who it seems is also a Scientific Linux developer, had this clarification for one of my assertions: "I hate to say bad things about your friend, but he's wrong about SL 'reverse-engineer'ing the RHEL packages. Unless a package has to be changed for branding reasons, we make no change whatsoever to our RHEL's source rpm's. We don't even unpack them. I should know, I'm the person who does it."
Another anonymous commenter countered some of the above conclusions: "CentOS has better hardware support than Scientific Linux. On my desktop computer, CentOS has sound but SL does not, because my sound chip is unsupported by Red Hat. Incidentally, it is incorrect to say RHEL is only a server distro: if you go to their products listing, you'll find separate listings for the server and desktop versions."

Movie Review: The Adjustment Bureau

Reader Mechatotoro (whose blog you should all read — it has lots of honest, funny, and insightful reviews, able to look at Linux from the perspectives of both the layperson and the expert) said, "Mmm. I'm not into movies myself, but you comparison of the movie being a combination of the Matrix and a romantic comedy stirs my curiosity."

Das U-Blog Turns 2!

Commenter Jussi said, "Congratulations! I have had a link to your blog for some time.http://tietsikka.blogspot.com/"

Thanks to all those who commented on this past week's posts. I had originally intended to review KDE 4.7, but there were a few things that made that not happen: I wanted to review it in ArchBang, but for some reason ArchBang refused to start in any graphics mode other than VESA, so I didn't think it was worth doing a review; furthermore, it seems like the improvements to KDE 4.7 are more technical than visible to the end-user, so I decided against doing a full review. This coming week, I may have another review out, but I can't guarantee anything. I'm sure I'll have something to write about though. Anyway, if you like what I write, please continue subscribing and commenting!

2011-08-01

Review: CentOS 6.0

Main Screen
Red Hat Enterprise Linux (RHEL) 6.0 was released a little less than 9 months ago, while RHEL derivative Scientific Linux 6.0 "Carbon" was released a little less than 5 months ago. Yet, it took 8 months after the release of RHEL 6.0 for CentOS 6.0 to be released. Two weeks after that, the CentOS 6.0 live medium was released, so I'm trying it out and reviewing it now.

So what is CentOS? Well, before I say that, it's important to know that RHEL is the flagship product of Red Hat; it's an OS meant for business and server environments, and its price is almost entirely for technical support, which can be purchased at different levels. It isn't available for home users for free; that's where Fedora and CentOS come in. Fedora is basically like RHEL's upstream, in that every few Fedora releases, a new version of RHEL based on that Fedora version is released; for example, Fedora Core 6 formed the basis of RHEL 5, while a combination of Fedora 12 and 13 formed the basis of RHEL 6. CentOS, on the other hand, is RHEL's clone; it is 100% identical to RHEL, except that all Red Hat branding is replaced by CentOS branding, and all references to Red Hat and RHEL are replaced by references to a more generic "upstream" or "Enterprise Linux", due to Red Hat's policies regarding its logo and name. Replacing the branding and rebuilding the packages is not trivial, and as far as I can tell, this release was particularly problematic, which is why it took a full 8 months (as opposed to the typical 1-3 months) after the corresponding RHEL release for the new CentOS version to be released.
Unfortunately, this unprecedented delay irritated some of the more vocal members of the Linux community, and as Scientific Linux 6.0 "Carbon" was released many months before CentOS 6.0 (while typically the newest Scientific Linux version is released after the corresponding CentOS version), former users of CentOS started switching to Scientific Linux. Well, CentOS 6.0 is finally here, so hopefully those disgruntled users are happy.

I tested CentOS on a live USB made with MultiSystem. I did not test the installation because I did that with Scientific Linux, and I don't see any reason why the installation should be any different; this is the same reason why I don't test the installation for every Ubuntu derivative I try out. Follow the jump to see what it's like. Also note that I originally wanted to do a direct comparison between Scientific Linux and CentOS, but I got impatient in waiting for the CentOS 6.0 live CD to be released, so I went ahead and tested Scientific Linux 6.0 "Carbon" by itself. Therefore, this article will make frequent references and comparisons to Scientific Linux. Finally, as was the case with the Scientific Linux review, though CentOS is really targeted at enterprise users and servers, I'm going to be reviewing it from the perspective of a home desktop user. Why? Well, Microsoft Windows 2000, the first home version of Microsoft Windows to be based on Microsoft Windows NT, which was previously just for servers and enterprise users, was very well-received among home users despite it targeting enterprise and server use. I'm reviewing CentOS from that same perspective.

2010-10-01

Stuxnet, Microsoft, and the Media

There have been a slew of articles about a new piece of malware called Stuxnet which has infected tens of thousands of computers in Iran without the computers' users' knowledge. There's an article by Ellen Nakashima in the Washington Post about how Stuxnet could be used against the US, considering the target of the original attack was probably one of the nuclear power plants in Iran. I wondered what sort of havoc it could wreak on our country's computers. Then I clicked on page 2, and my suspicions — not about Stuxnet's fearsome capabilities, but about its modus operandi and how the mainstream media would report it — were confirmed.
Of course, reading the article again, I should have been suspicious on page 1 itself, considering that "[t]he antivirus security firm Symantec analyzed the worm this summer." Does anyone seriously expect Symantec to be a disinterested party in this? It's a question of computer security, so of course they're going to inflate numbers a little (though whether they've actually done so this time or not is another question) to scare the public into buying their products.
But the second page holds the real "goodies" of this article. Let's go through the major ones.
But "not even two days later," he said, a hacker Web site posted the code so that others could use it to exploit the vulnerabilities in Microsoft.
I should have figured as much. It only affects Microsoft software. Why must the mainstream media equate Microsoft software with all software, considering that in higher levels of the government (e.g. the Department of Defense) Linux is in widespread use for its security benefits? For goodness sake, the military uses RHEL/CentOS!
* It exploited four Microsoft "zero-day" vulnerabilities, allowing Stuxnet to spread automatically without computers users' knowledge.
* One vulnerability allowed the worm to spread via the use of a thumb drive or other removable device. That flaw and one other have since been patched.
* It is autonomous - it requires no hidden hand at the control stick to direct its moves. [...]
* Once it found its target, it was designed to inject code into the controller to change a process. What that process is, is not yet known.
All of these have to do with the fact that Microsoft Windows automatically elevates users to administrator privileges and grants executables administrative privileges as well, so of course this virus will spread without the user's knowledge, spread via removable media, spread autonomously, and inject code autonomously. With Linux, the concept of user privileges (as well as the way Linux handles executables, which is very different from Microsoft Windows) means that this sort of thing would require a lot more effort to execute. And don't counter with Apple's Mac OS X; a recent Secunia report has showed that Apple software has experienced more security vulnerabilities this year than Microsoft software.
So please, Washington Post: don't conflate Microsoft software with all software, and please do some more of the investigative reporting that made you famous in the 1970s with regard to a certain president; is that too much to ask, in this day and age?

2010-07-17

Red Hat, Fedora, and Small Towns

I was visiting $relative's house in a small town, where access to the cutting edge in technology is not the easiest to come by. First, I was surprised to find a digital photo frame (and a big one, at that) hanging on the wall. Then, $relative asked me to turn on the computer so that I could show some recent family pictures to other relatives. I turned on the computer, expecting to find nothing more than the Microsoft Windows XP loading screen. To my shock (which quickly morphed into delight), I was greeted instead by this (note: not verbatim):
GNU GRUB Version 0.97
Please choose which operating system to start:
Fedora Core 6
Microsoft Windows XP
I wasn't sure if $relative used Fedora or Windows, so I left it at Fedora. It stopped at the login screen; by then, $relative came in and restarted the computer (to start with Windows) as $relative didn't know the login information for Fedora, so the question of how their Fedora installation was became moot.
(For those who don't know, up till version 7, the official Fedora releases were termed Fedora Core because the base installation only had the official Red Hat code, while the extra downloadables were community-supported extras.)
This leads me into my next point: RHEL 6 is coming out soon! The great site Dedoimedo has a nice review of a beta release of it (though this beta is fairly representative of the upcoming official release, as far as I know). The review also expresses excitement over the near-simultaneous release of CentOS 6, CentOS being the free-of-charge community version of RHEL, as it brings a stable yet modern operating system to the desktop once more. (Fedora was supposed to be the community version of RHEL when it started, but it decided to go for cutting-edge technologies while RHEL stayed with stability above all else.)
But, Dedoimedo, may I remind you of Scientific Linux. It has all of the stable goodness of CentOS with the added goodies of proprietary codecs preinstalled as well as some useful scientific tools preinstalled.
So let me say that while I am certainly excited about RHEL 6 and CentOS 6, I am really excited about Scientific Linux 6.