Here is a picture of my three-week-old son Nicholas Robert getting his first taste of Linux. Love your magazine—keep up the fantastic work!
I am the System/Network Admin in an office environment of relatively new PCs (about 25) and a few servers. When I started, it was 100% Microsoft. Now our department relies heavily on two Slackware servers. One of the duties of the bigger server is a Samba file server that everybody has access to. I had the idea one day of a pseudo RAID-5 implementation over the network. All these new PCs with 80GB hard drives, using only ~3GB, because everybody is using the Samba share.
What if someone took existing code from LVM and the highly stable RAID-x kernel modules and made a project that allowed you to create a file of a fixed size on each one of those Windows machines, say 40GB per machine, and then mount it as one large volume to be re-shared out to those who save everything to the X drive?
Because the Windows PC will have a single fixed 40GB file, it will be easy to configure remote or local backup software (I selected BackupPC) to ignore that file when performing a backup.
Your total storage with the above example would be
(n–8)*40 where n is the number of PCs. 680GB of
redundant storage is a big step up from the 80GB
RAID 1 file server in use now. This would not be the
best solution for large, frequently used files as
the network would easily become a bottleneck, but
for ever-increasing storage demands from archiving
sales records and raw images for Web site products
that are modified once then kept forever, it's a
great solution. At least I think so. Thank you for
a great magazine.
If you can do that with good performance, stability and security, you'll never have to buy your own beverages at USENIX conferences. —Ed.
I have been a subscriber to Linux Journal for several years now. One thing that I have noticed is that LJ doesn't seem to have a particular area to focus on. Are your articles intended for desktop users or for server administrators? Please choose your niche and stick to it.
In the meantime, I've just renewed my subscription
for another year. I'd really appreciate seeing more
desktop-oriented articles in future, and less of the
server- and network-administrator stuff. I subscribe
to other magazines for that.
Non-Linux OSes are cluttered with so much junk because people don't learn from other areas of development. The desktop, server and embedded environments have a lot to teach each other. —Ed.
I'd like to second the suggestion by Ramer W. Streed
in the February 2005 Letters section (page 6) for an article
on fanless computers. Fans are noisy and irritating.
Besides, my wife is a heavy smoker, and computer vents
and heat sinks in our house tend to get clogged with
Streed's request was for a fanless PowerPC, but I'd
settle for anything without a fan, as long as it has
reasonable capability and runs Linux.
A. T. Young
We might have a little surprise in store for you. —Ed.
My understanding of having ads in TV, radio and magazines is to generate money. As long as the ad is not ethically incorrect, why not publish it? Why not let Microsoft help pay to spread Linux knowledge? Microsoft had an ad on a Linux forum I visit regularly, and I would faithfully click on it every day. Sometimes twice a day. Would I use a Microsoft product? Not in the near future, but each and every click on that ad helped keep that forum free. A free forum is a good match to a free operating system.
We live in the information age. It is not the Microsoft vs.
Linux issue that so many people try to create. It is
monopoly vs. free-flowing information. As a matter of
fact, not allowing something because it can compete is
doing business the Microsoft way. I would not object
to seeing a Microsoft ad in a Linux magazine. As a
matter of fact, I would like to see those expensive
two page or fold out ads pushing Microsoft products
to pay for a new section called “newbie corner”, or
something like that. If nothing else, I would rather
flip over that ugly Windows logo than pay more for
Here's a picture of my son Gabriel, age 1 1/2 showing his affection to our beloved Penguin. Maybe we'll see it in one of your issues! All the best from one of your subscribers.
Greetings from Guatemala, Central America. Since 1999 this girl is in love with Linux and her cat!
In the diff -u section in the February 2005 issue, Zack Brown reports the bug found by Pavel Macheck in 2.4 kernel: in year 9223372034708485227, or 9.22 x 1018 all 2.4 kernels will immediately stop.
This is a great discovery that should be presented to the astronomical community. Following J.D. Barrow & F.J. Tipler in The Anthropic Cosmological Principle book, at the same time 2.4 kernel Linuxes will die, Neutron Stars will cool to 100 degrees Kelvin and planets' orbits will collapse via gravitational radiation. All of this will happen long after the Sun abandons the Main Sequence (5 x 109 years) and all the stars become white dwarfs (1 x 1012 years).
I think this is a new astronomical landmark that all
Linux users should ask to include in the astronomical
almanac of the foreseen history of the Universe.
I was working on a newly purchased server, and in the documentation package, I came across this CD. Nothing special about the disc itself, but the label was rather entertaining. Notice that the disc is both Microsoft Certified and Powered by Linux. Hope you find it as entertaining as I did.
The fact that most of the comments on the new Web site
are posted by Anonymous makes reading the threads
very difficult, particularly when contrary views are
espoused. A good example is the thread following this
It's hard to know who is saying what and who is
new to the conversation.
How about enforcing the entry of a name, even if it
isn't a real one?
There is this fantastic confectioner in Walpole, New Hampshire that makes these cute little chocolate penguins. They also have a shop for gifts: www.laburdick.com. They will ship boxes and baskets and of course the penguin.
These two future kernel hackers had not seen a computer taller than themselves until I took them to see NASA Ames' 10,240 CPU Linux system, Columbia. Tony (foreground), an avid collector of spongy penguins given out at various Linux events, now thinks computers were created by penguins, or vice versa. Ronnie, on the other hand, no longer just asks to go to Daddy's work. He now wants to see Daddy's “Big Work”.
Photo of the Month gets you a one-year extension to your subscription. Photos to firstname.lastname@example.org. —Ed.
I first congratulate you and your team for your excellent Linux Journal—I wait for it every month. I attach a picture of my seven-day old son, Sebastian, who seems to sleep very well with his favorite penguins. He doesn't like worms, bugs or horses (maybe trojan ones).
I'll let you guess which OS he most likely will be familiar/comfortable with in the near future. Penguins are a very common animal here in Chile. There is a group of them about 40km From where I live.
You've been fiddling with Linux laptops. Doc has
an EmperorLinux Toucan (aka IBM Thinkpad T41), and
Don has reviewed the HP NX5000. Doc has used Apple
PowerBooks in the past.
I've felt that trying to use Linux on a laptop was
always a “hack”. Never really worked right. And, I've
tried it on more than once with more than one distro.
So, which is the way to go? A PowerBook with a
Power PC Linux Distro? An EmperorLinux hybrid?
DIY and hope for the best?
That's a tough one. We're impressed with how all of HP's hardware was working out of the box, that the system price didn't include a proprietary OS “tax” and that we could get hardware and software phone support with one call. EmperorLinux will sell you a working Linux install on a wide selection of name-brand systems. Don and Jill both have IBM ThinkPads from them, but Don's new Linux load is definitely on the DIY side. LinuxCertified also sells x86 Linux laptops, and Terra Soft will pre-install on Apple hardware, but we haven't reviewed either one. —Ed.
I would like to read about virtualization using Xen in Linux Journal.
Are you considering publishing an article about this issue?
Yes, we are. —Ed.
Good articles on setting up NIS [see Alf Wachsmann's articles in the February, March and April 2005 issues]. There is one additional step that can be done when setting up the project area. After running the commands in the article, set the group sticky bit, which will cause new files to inherit the group ownership from the directory:
chmod g+s /projects/X/
That eliminates the need to use newgrp so much. But
still, users need to be reminded about their umask.
In this case, I'd recommend either 007 (no world
access) or 002 (no world write acccess).
I also like to set the owner of the /projects/X/
directory to be the point of contact for the project.
Practical Task Scheduling Deployment
July 20, 2016 12:00 pm CDT
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
Join Linux Journal's Mike Diehl and Pat Cameron of Help Systems.
Free to Linux Journal readers.Register Now!
- SUSE LLC's SUSE Manager
- My +1 Sword of Productivity
- Managing Linux Using Puppet
- Non-Linux FOSS: Caffeine!
- Murat Yener and Onur Dundar's Expert Android Studio (Wrox)
- Tech Tip: Really Simple HTTP Server with Python
- Doing for User Space What We Did for Kernel Space
- Rogue Wave Software's Zend Server
- Parsing an RSS News Feed with a Bash Script
- SuperTuxKart 0.9.2 Released
With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide