LinuxQuestions.org - Blogs

hardware compatibility

niraj_india — Sat, 21 Nov 2009 04:24:24 GMT

on which hardware configuration fedora-9 or fedora-4 install without any kernel error

niraj kumar

Is it possible to ask DHCP assign a randomize hostname to client?

Reaperhk — Sat, 21 Nov 2009 03:30:53 GMT

Quote:

Originally Posted by MS3FGX

DHCP doesn't set the hostname on the client machine, it can only add DNS records for clients. Is that what you are looking to do?

The actual hostname would be the same, but other machines on the network would resolve it as whatever you set the DNS name to.

Thanks about it.

As I need to create a image for a computer lab which have a lot of Virtual Machines (by VMWare workstation) on top of it. I want to solve the duplicate hostname problem.

4 Computer Lab, each lab has 25-50 Computers,
all the computer is Windows XP locked by SteadyState.
On top of it, there will be a lot of different VMWare image. I am thinking if it is possible to use DHCP + DNS to solve the duplicate hostname problem.

How it's meant to be done with PHP

Web31337 — Sat, 21 Nov 2009 00:50:48 GMT

I have been working on SEO topic for last two months. Now i got some free time and decided to get back to web31337 CMS coding.
As usual, when I get back to my code after month or two i begin to see some stupid code or mistakes =))) I find it quite hard, because, honestly, if i continue it that way i will never be at the end. I'm searching for an ideal code but i can write none of it myself by now :D It's a thing needs time and skill. I guess anyway i will finish it sooner or later so make it the best code ever been written in PHP =) I put my all creativity within this code. The last artwork i will do on PHP.
I love and hate this language. I love it because it's simple and i hate it because it has the biggest number of applications that were coded in a very stupid way. Seems like almost everyone calls himself a coder after he learned a few basics of PHP. And they don't even knowing about security and other things begin to code huge applications at once so it results in what we see for a number of years already. The CMSs with stupid code, with bugs and with vulnerabilities. That's what world of PHP applications now is.
My last word is to be about security and stability and speed. With that last word i finish my coding on PHP and bring this to the whole world: "Look and see how it's meant to be done with PHP".
And I hope i can make it a start of a new era of PHP coding in the world when Web31337 CMS comes to be known. Those who will follow this code will make better CMSs and make end-users happier when their sites won't be slow or bad or be cracked by crackers.
OpenSource forever! OpenSource is meant to be for people. While all other things are meant to be for money. Move the OpenSource way! Share your code and your knowledge and your love and make this world better!
"Let us together rebuild this world that we may share in days of peace!" (C) LOTR

step by step configuration of vpn server

narendra.server — Fri, 20 Nov 2009 12:54:53 GMT

Dear all,

please tell me the vpn server configuration and also tell me how to subscribe the threads easly.

Thanks

Mr Bisquit gets bisquity

Mr-Bisquit — Fri, 20 Nov 2009 07:38:57 GMT

I'm taking my bisquity self on vacation.

launchd script for OS/X for bash daemon

roybal — Thu, 19 Nov 2009 22:29:58 GMT

Here's an example of a launchd script that will start the service (if you used the template from the previous example).

launchd script

/bithead

Ubuntu Package Pinning

pereb — Thu, 19 Nov 2009 19:08:20 GMT

A few weeks back I upgraded my Kubuntu installation to Karmic kaffeine version 1 came with it. Personally I would rather have kaffeine 0.8 so I decided to attempt to block updates to the package in order to use accomplish this.

The first step was to check the current version on the machine. So I needed to know the exact name of the package. In order to locate the name of the package I used the search function in apt. This returns matching packages with exact name and a short description of them. To try this out, you can use the following command: apt-cache search {searchword}.

In this case I searched for kaffeine and got the following result:

Code:

temp@folder:~$ apt-cache search kaffeine
kaffeine - versatile media player for KDE
libxine1-x - X desktop video output plugins for libxine1
kaffeine-mozilla - mozilla plugin that launches kaffeine for supported media types
w-scan - Channel scanning tool for for DVB and ATSC channels

Obviously the package I am looking for is named kaffeine. The next thing i needed to do is check which version is currently installed and which versions are available. This can be accomplished by using the command apt-cache policy packagename. So I used the command apt-cache policy kaffeine and got the following result:

Code:

temp@folder:~$ apt-cache policy kaffeine
kaffeine:
  Installed: 1.0~pre2-0ubuntu1
  Candidate: 1.0~pre2-0ubuntu1
  Versions:
*** 1.0~pre2-0ubuntu1 0
        500 http://archive.ubuntu.com karmic/main Packages
        100 /var/lib/dpkg/status

This lets me know that the installed version is 1.0 and that it is the latest available version. It also tells you that that version is available from http://archive.ubuntu.com karmic/main Packages.

From there I uninstalled the currently installed version of kaffeine and downloaded the kaffeine version of my choice from packages.ubuntu.com. apt-cache policy now returns:

Code:

  Installed: 0.8.7-1ubuntu5
  Candidate: 1.0~pre2-0ubuntu1
  Versions:
     1.0~pre2-0ubuntu1 0
        500 http://archive.ubuntu.com karmic/main Packages
*** 0.8.7-1ubuntu5 0
        100 /var/lib/dpkg/status

This tells me that the installed version is 0.8.7 and that the main packages offer a newer version. You don't want to update now because kaffeine 1.0 will be reinstalled. In order to prevent this from happening it's necessary to pin or hold the package.

This is pretty easy with aptitude: open a command line and type: sudo aptitude hold {packagename}. Aptitude will freeze the version to the currently installed one. This also freezes the version for all graphical interfaces, such as kpackagekit and synaptic. Pretty nifty.

Now If you are using apt-get things get a little more complicated, you'll have to pin the package. Pinning is pretty powerful, giving you much more options than simply to freezing, you can set up filters or rules about which version should be kept, when a package should be down- or upgraded and much more. A general introduction to the settings of apt and more precisely pinning can be found by entering man apt_preferences into command line.

To block a package for apt-get you need to edit /etc/apt/preferences. There you can enter the following kind of config:

Code:

Package: kaffeine
Pin: version 0.8.7*
Pin-Priority: 1000

The first line gives the package which is configured.
The second line lists what we want. The wanted package must not be defined by version, it can also be defined by release or origin or a combination of these keywords. More information can be found in your man-pages.
The third line gives the priority. Citing from the man-page:

Quote:

Priorities (P) assigned in the APT preferences file must be positive
or negative integers. They are interpreted as follows (roughly
speaking):

P > 1000
causes a version to be installed even if this constitutes a
downgrade of the package

990 < P <=1000
causes a version to be installed even if it does not come from the
target release, unless the installed version is more recent

500 < P <=990
causes a version to be installed unless there is a version
available belonging to the target release or the installed version
is more recent

100 < P <=500
causes a version to be installed unless there is a version
available belonging to some other distribution or the installed
version is more recent

0 < P <=100
causes a version to be installed only if there is no installed
version of the package

P < 0
prevents the version from being installed

So the config I posted earlier says that the package kaffeine with version number 0.8.7* will be installed and preferred even if the install is a downgrade. Putting that config into place and saving it (you will need SUDO powers for saving) will hold that package in the current version, so that it won't be overwritten when updates are applied.

Taking another look at the output of apt-cache policy, we can now also understand the numbers in front of the source: 100 means that this is the currently installed version, while 500, the pin-priority of the main server, means that those packages will only be installed when they are newer than the currently installed package.

Adobe reader 7.0 Installation error

dhir_dhiru — Thu, 19 Nov 2009 12:49:39 GMT

When Installing adobe reader 7.0 in Red Hat 9.0 ver 2.4.20-8 I am Getting Following error by RPM:

error: Failed dependencies:
gtk2 >= 2.4.0 is needed by AdobeReader_enu-7.0.9-1

When installed through Source code

GTK + UI Toolkit libraries ver 2.4 or greater not found

Sudo Package

suse484 — Wed, 18 Nov 2009 19:08:20 GMT

I need to install sudo package on SuSE 8.2(i586),Redhat 6.2,AIX 4.3 and HP-UX 11 servers.
Please help me.

A Day in the Life of Your Average Linux User: Rails on Ubuntu

Murdock1979 — Wed, 18 Nov 2009 13:02:31 GMT

*Disclaimer: the following narration is for entertainment purposes only and does not necessarily reflect any real scenarios...or does it?

Let's follow a seemingly "simple" task for an average Linux user:

Scenario: Install Ruby on Rails on Ubuntu System

This sounds simple enough. Anyone familiar with Rails, knows there are 4 easy steps to installing a Rails web model:
1. Install Rubygems
2. Update Ruby Gem system
3. Install Rails
4. Run Rails application on specific directory
(we're going to leave Fastcgi/Apache stuff for another time)

Let's begin:

*Time: 12:00pm

Step I. Install Rubygems:

1. sudo su (makes the whole process easier)
2. apt-get install rubygems1.8

This installed without any hiccups. We are happy.

Step II. Update Gems

*Time: 12:02pm

2. sudo gem update --system

Odd, bash gives the following error:
ERROR: While executing gem ... (RuntimeError)
gem update --system is disabled on Debian. RubyGems can be updated using the official Debian repositories by aptitude or apt-get.

Ok, so Debian/Ubuntu will be nice enough to update gems for me. So...

3. Update Apt-get

Done

*Time: 12:05 pm

4. Wait a minute...Gems is still version 1.3.1. Ubuntu didn't update Rubygems? Ubuntu wouldn't be so dumb to make me upgrade my entire Operating System just to upgrade one little application, would it? It's obviously at its latest version. Let's move on and install Rails.

Step III. Install Rails

1. Run "gem install rails"

This takes a little time, do some df on another terminal to keep busy, but eventually everything goes well. Bash tells:
Successfully installed rails-2.3.4
along with telling me it installed the other dependencies and docs as well.

Step IV. Run Rails on Directory.

1. Excited that the process is almost finished. All we do now is run "rails /home/john/firstrails" and rails will magically install all those actionclasses files in the directory. Or will it?

Bash says it can't find the rails application. What gives?

*Time: 12:12pm

2. Let's try to find if Ubuntu installed the gems correctly, so I cd to /var/lib/gems/1.8/gems and everything is there. What could be wrong? Off to Google!

3. Google search for Ubuntu Rails Install. Aha...a page to install Rails on Ubuntu. Fantastic - this should help. It shows a how-to for ubuntu hardy, Janty-something, 8.04...oh, wait, it looks like I need to set my $PATH for Ubuntu to recognize the gem applications. That's funny, in Slackware, that wasn't necessary.

4. Here's goes: PATH=/var/lib/gems/1.8/bin:$PATH

*Time: 12:25pm

5. now we're ready to rumble. Let's leave root...exit.

6. Rails ~/firstrails

Still can't find rails? Oh, forgot to set the PATH for the user...set it for root by mistake, woopsy me.

7. PATH=/var/lib/gems/1.8/bin:$PATH

8. Let's try again: Rails ~/firstrails

Yay! Look at the standard output go!

exists
create app/controllers
create app/helpers
create app/models
create app/views/layouts
create config/environments
create config/initializers
create config/locales
...
...

*Time: 12:33pm

9. Looks like we're finished. Let's run the Webrick server just to see everything is in order: script/server

Not to worry, being around long enough gives someone the intuition that it won't work on the first go. And, lo and behold, Bash proudly heralds:
Rails requires RubyGems >= 1.3.2 (you have 1.3.1). Please `gem update --system` and try again.

Gee thank you Rubygems...if I need a higher version of Rubygems, why in the world would you, Rubygems yourself, install a version of Rails you can't even run!?

Oh, but didn't I install the latest version of RubyGems from the Ubuntu respository? Oh, silly me, I'm using an old, and I guess outdated, version of Ubuntu that came out barely a year ago. I guess Ubuntu wants me to upgrade my entire system just to install a little Rubygem application. Luckily, we're not dumb enough to listen. There's an easier way.

10. The solution: Install an earlier version of Rails that will run on Rubygems 1.3.1. Abra Cadabra: gem install rails --version 1.2.6!

Alright. We're gaining momentum now. Bash tells version 1.2.6 of Rails installed successfully. Everything looks good to go!

11. A rm -R on the ~/firstrails directory to start again clean.

*12:45pm

12. Of course, when we run rails ~/firstrails, I would need to specify which version of rails, since we have the newest version and 1.2.6 installed. If Rubygems can install multiple versions, rails should have an option to determine which version to use. Surely doing a rails --help would give me the right information. Hmm, nope, the only option is --version, which shows the version, not sets it.

13. No choice, but to gem uninstall rails --version 2.4.3.

Ok, good, it's gone.

*Time 12:52pm

14. Let's run it again: rails ~/firstrails.

And the standard output goes wild!
exists
create app/controllers
create app/helpers
create app/models
create app/views/layouts
create config/environments
create config/initializers
create config/locales
...
...

15. Crack our knuckles, we're ready to lauch: script/server

Yippy!

=> Booting WEBrick...
=> Rails application started on http://0.0.0.0:3000
=> Ctrl-C to shutdown server; call with --help for options
[2009-11-18 14:37:54] INFO WEBrick 1.3.1
[2009-11-18 14:37:54] INFO ruby 1.8.7 (2008-08-11) [i486-linux]
[2009-11-18 14:37:54] INFO WEBrick::HTTPServer#start: pid=16555 port=3000

*Time 1:00pm

openSUSE 11.2: Getting Started!

~sHyLoCk~ — Wed, 18 Nov 2009 06:12:21 GMT

Originally posted in my BLOG.

First things first, let me once again tell you I've become a huge fan of openSUSE. it's absolutely everything I look for in an OS Desktop OS.

Now I'm gonna write my experience down. A few slight quirks, which was not SUSE's fault but since I'm new to it [ well I used it a year ago, but that was only for a month], it was mainly because I wasn't aware of SUSE's way of doing things.

openSUSE is well known for it's user-friendliness. YAST has the ultimate tool which is everything that you need in order to control your system. From repositories to Kernel Modules, you can customize anything using it. It's an all in one super control center for your machine.

I will only talk about KDE here, since I don't use Gnome.

After the install was over, I was asked to update around 500megs of packages. I was shocked as this was a fresh install. So I went into YasT -> Software Management->Installation Summary, and found out that the packages were mainly aspell and OpenOffice Language packs. So I taboofied them as I didn't want them installed ever. :D

My update was then cut from 500 to 23Mb and I updated a few packages.

Immediately I had to get the Nvidia driver to fix my display. So, I added the Nvidia repo and installed the driver.

Then I wanted to see how multimedia support was. As I had installed from the KDE Live CD and not the DVD [which I have downloaded later to keep incase of a re-install], I needed to download a lot of stuffs, mainly codecs and players,etc. I came accross this guide in the forum which helped me get started.

Being an Arch user the best part I liked about openSUSE was their Additional Package Repositories. It is like AUR but segmented into various categories.

So I added a few repos from there, like KDE community,backports, VLC, Education, Games,etc. Now that I learnt how to use YaST, I wanted to check out the CLI way in openSUSE. You have to use zypper.

So to refresh the package repos [as root]:

Code:

zypper ref

To list repos:

Code:

zypper lr

To check upates:

Code:

zypper lu

To update:

Code:

zypper up

To check patches:

Code:

zypper pchk

zypper lp

[I still don't know the difference between these two commands.]

Anyway, so I was quite happy with my KDE 4.3.1 for a few days and then decided to see how I can manage to install KDE 4.3.3. I asked about it in the forum, and was pretty much satisfied with the quick reply.So, my KDE upgrade was successful.

Overall my openSUSE 11.2 experience was quite good. It impressed me. Last year when I tried it, I had lotsa problems. YaST was slow. KDE4.1 was buggy, it would crash every few minutes. But this time around they really released a polished, stable, great looking desktop. YaST works fine and so far no crashes. For the first time, I can suspend to disk easily without any system instability. I am loving my SUSE. ;)

Linux incompatible with HP Compaq dc7900?

Anemocracy — Wed, 18 Nov 2009 02:06:14 GMT

Quote:

Originally Posted by irishbitte

Have you thought about running linux as a Virtual Machine? It means you can mess up plenty and still start from scratch, especially if you 'need' your current windows installation. I suggest running a linux in VirtualBox and seeing how you get on. Also means someone could help you through it using logmein.com or something similar.

Thank you, I'll give that a shot and report back :)

enable mp3 support in K3b - ubuntu 9.10

jkzfixme — Wed, 18 Nov 2009 01:35:41 GMT

I recently took the plunge and upgraded my daily driver box to the latest greatest. There is nothing ground breaking about the install other than the speed of ext 4 so I wont bother going into that aspect. However one thing that threw me was K3b. When burning a cd for my daughter it kept coming up with

Quote:

Unable to handle the following files due to an unsupported format:

It has been so long since I did a fresh install in a desktop environment as opposed to a server that I totally forgot about the legal implications of mp3 encoding / decoding. To get around this douchbagery it is simplicity in itself. Open up a command terminal and type this in ...

Quote:

sudo apt-get install libk3b6-extracodecs

Voila it should be that easy, now my little girl is back to accosting my ears with whatever shenanigans it is that they listen to at 6.

bash diff2html compare differences in 2 files in html

roybal — Tue, 17 Nov 2009 20:43:38 GMT

diff2html is a free and open source utility that uses the output of diff(1) to graphically compare two files in html.

diff2html

The whole thing is written in bash 3.2

/bithead

OS/X bash daemon script

roybal — Tue, 17 Nov 2009 18:41:36 GMT

Here's a template for how to create a daemon or launchd script in bash.

Bash OS/X daemon template

/bithead