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tutorial - Installing Real Player and Configuring Mozilla Plugin

The following steps show how to install Real Player 11 and Mozilla Plugin for Firefox 3.x browsers running on Hardy Heron.

Download Real Player 11 from: www.real.com/linux

Open a terminal and change to the directory where the file was downloaded. Grant execute permissions and run the setup using the following commands:

# chmod 770 RealPlayer11GOLD.bin
# sudo ./RealPlayer11GOLD.bin

Use the following default installation directory during the installation:

/opt/real/RealPlayer

Configuration:

1) Run Real Player using command: realplay and click on "next" till you reach the screen (below) to configure the mozilla plugins

After completion, Open Firefox and type about:plugins in the address bar. Scroll down and look for the following entry.

Helix DNA Plugin: RealPlayer G2 Plug-In Compatible

File name: nphelix.so

Helix DNA Plugin: RealPlayer G2 Plug-In Compatible version 0.4.0.4005 built with gcc 3.4.3 on Feb 25 2008

If found, your Real Player and its Plugin is installed properly!

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source:http://linuxpoison.blogspot.com/2008/09/13578175717631.html

tutorial - How to check is service is tcpwrapper enable

In order to use hosts_access (hosts.allow/hosts.deny), a service would need to be compiled in with tcpwrapper (tcpd) support and can be checked easily with the below commands.

# ldd `which sshd` | grep -i libwrap

or

# strings `which sshd` | grep -i libwrap

Both the commands should echo out libwrap.so.0 which would mean hosts_access can be used for service sshd.

Make sure you are able to connect to ssh, add your IP to "/etc/hosts.allow". In the below case I am using the full range of my local intranet (LAN).

# Allow localhost
ALL: 127.
# Allow LAN
sshd: 192.168.

Now to block ssh access to others, simply add the below lines to "/etc/hosts.deny".

# Block everyone else from SSH
sshd: ALL

Note: hosts.allow takes precedence over hosts.deny.

source:http://linuxpoison.blogspot.com/2008/09/135781757119650.html

tutorial - ACL Editor - Eiciel

Traditionally, in UNIX, files have three kind of permissions associated to them. Those permissions, called UGO (from User, Group and Others) allow you to set whether a user can read, write or execute a file.
Permissions can only be changed by the owner (or the superuser).

UGO permissions are suitable for most scenarios. However, IEEE POSIX workgroup was conscious that sometimes they are too limiting and defined an interface in POSIX 1003.1e DRAFT 17 intended to manage file ACLs. That proposal was left out from the standard but is implemented in several BSD (Solaris and FreeBSD 5) and GNU/Linux (as of version 2.6 of the kernel).

ACL allow to set permissions in a per-user or per-group fashion. For instance, it is not feasible in UGO permissions to have two users (bob and alice) where bob can only read, alice can read and write and no other user can access the file.

Traditionally, tools to manage file ACL entries have been setfacl and getfacl. Those are command-line tools and some people can feel uncomfortable using them.

Eiciel allows you to visually edit file ACL entries. You can add and remove users and groups who will be granted permissions through the graphical interface.

Installation

After checking you satisfy all the requirements of Eiciel.

$ tar xvfj eiciel-XXX.tar.bz2
$ cd eiciel-XXX
$ ./configure
$ make
$ su
# make install

Don't forget to restart Nautilus. The following command will quit it, but GNOME will restart it again.

$ nautilus -q

For Eiciel 0.7 and later configure needs to know where Nautilus extensions must be installed. It will try to detect it automatically. If the directory is incorrectly guessed you can override it with --with-nautilus-extensions-dir=directory.

For Eiciel 0.6 or former configure needs to know where Bonobo servers must be installed. It will try to detect it automatically. If the directory is incorrectly guessed you can override it with --with-bonobo-dir=directory.

source:http://linuxpoison.blogspot.com/2008/09/13578175715381.html

tutorial - Package management in Fedora 9

To manage packages from the command line in Fedora 9, there are two options available: first, you could continue to use the yum command which is still present. The second option is to use the PackageKit command-line tool, pkcon, which works a lot like the yum command but which interfaces with the PackageKit service.

Like yum, pkcon accepts a subcommand and arguments. Here are some of the more common uses and the closest corresponding yum command:

pkcon command	yum command	description
pkcon search name pattern	yum list pattern	lists packages with names containing pattern (note: with yum it's necessary to specify wildcard astrisks if required.).
pkcon search details pattern	yum search pattern	lists packages with details (including description) containing pattern
pkcon install packageId	yum install packagename	installs the designated package
pkcon install-file filename	yum localinstall filename	installs the designated RPM file, resolving dependencies through yum repositories as required
pkcon update-system	yum update	update all packages on the system for which updates are available
pkcon update packageId	yum update packagename	update only the specified package
pkcon get description packageId	yum info packagename	get detailed information on the specified package
pkcon get depends packageId	yum deplist packagename	display dependency information for a package

Since pkcon queues requests with the PackageManager service, it does not ask for confirmation before proceeding with an installation or removal (which is the default behavior for yum). However, you do have the option of adding the -n option to the command line to enqueue a request without waiting for it to complete.

source:http://linuxpoison.blogspot.com/2008/09/135781757111302.html

tutorial - Installation and Configuration of Gnome-DO

GNOME enthusiasts have a couple of good options when it comes to searching, launching, and otherwise manipulating and accessing files, applications, and information right from the desktop: GNOME-Do, and the GNOME Deskbar applet.

GNOME-Do is a desktop search and application-launching applet similar to the now-defunct GNOME Launchbox. It's inspired by Quicksilver, an applet for Apple's Mac OS X operating system. Do was built for the GNOME desktop but also runs on KDE. Developers call Do an "intelligent launcher tool" because it uses predictive technology to guess what you want to do when you start typing the first few letters of the name of an application, file, or contact.

openSUSE 11.0
GNOME Do is installed by default but it's version 0.4 and new plugins aren't compatible with this version. To install the newest version just click here.

Fedora
GNOME do is in the repos for all stable Fedora releases and the development branch, use the graphical tools to install it or invoke the following as root:

# yum install gnome-do

Usage
Start GNOME Do by selecting the GNOME Do entry in the Applications > Accessories menu, or by executing the command:

$ gnome-do

Once the application is running, you can summon it by pressing Super + Space. On most keyboards the super key is the same as the Windows key or the Command key. If you'd like to use a different keybinding for GNOME Do

You should see a dialog with a search icon and two panes in the center of your screen. The pane on the left is the item pane, which shows the item you have selected, and the pane on the right is the action pane, which shows the action you wish to perform on the item.

Type in the left pane to search for an item, anything from programs, to contacts, to albums, to text can be used as an item. Pressing Tab will switch you from the Item pane to the Action pane, allowing you to select an action to perform on that item, by typing its name. All panes of gnome-do have autocomplete (so you don't have to type the full name of an item or action), and active learning, so your most used items come up first when searched. Hitting Enter at any time will perform the action on the right to the item on the left, such as running a program, opening a bookmark, sending an e-mail, etc.

source:http://linuxpoison.blogspot.com/2008/09/13578175712496.html

tutorial - How to create own Grub Splash Screen

Customizing your boot screen with a favorite photo, your company logo, or even a cartoon is quite straightforward:

1. Prepare a suitable image. The image must be 640x480 pixels and have a maximum of 14 colours, because the VGA mode used during boot has a resolution of 640x480 pixels with 16 colours and 2 colours are reserved for text (white and black). If you're using the Gimp graphics editor, simply ensure that your image is 640x480 pixels (the titlebar of the image window displays the image size) and then select the menu option Image>Mode>Indexed, entering 14 as the "Maximum number of colours".

2. Save the image to your /boot/grub directory with an extension of .xpm.gz

3. Edit your /boot/grub/grub.conf file so that the splashimage entry points to our new image file. This path will be relative to the start of the /boot partition, so /boot/grub/myimage.xpm.gz would be written as (hdX,Y)/grub/myimage.xpm.gz (where X is the BIOS/Grub disk number and Y is the BIOS/Grub partition number).

      default=0
      timeout=5
      splashimage=(hd0,0)/grub/myimage.xpm.gz
      hiddenmenu
      title Fedora (2.6.23.15-137.fc8)
      root (hd0,0)
      kernel /vmlinuz-2.6.23.15-137.fc8 ro root=/dev/hda6 quiet
      initrd /initrd-2.6.23.15-137.fc8.img

Reboot to see the result.

The XPM format used by Grub is very unusual: it's actually a snippet of C source code containing an ascii-to-colour translation table and the image encoded as ASCII art. You can see this by using gunzip to decompress the file and then viewing it as text.

Tips on preparing a grub splash image:

* Choose an image with a small number of colours to avoid excessive dithering or solarization when converting to indexed format.

* Grub displays text in white with a black drop-shadow, so it should be visible against any colour background -- but it it's best to avoid white or really light colours for maximum readability.

source:http://linuxpoison.blogspot.com/2008/09/135781757118764.html

tutorial - Differences between Packet and Statefull Firewalls

Packet firewall: A packet firewall only checks for source and destination IP addresses and port numbers.

Stateful Firewall: A stateful firewall not only checks for source and destination IP addresses and port numbers, but it also LISTENS to all TCP/IP communications to make sure that all of the "communications" are following all procedures.

source:http://linuxpoison.blogspot.com/2008/10/13578175719368.html

tutorial - Windows XP like Linux - Linux XP

Linux XP is a shareware operating system that was first released by EnabledPeople. It is designed to imitate the Windows environment. It is currently owned by Trustverse and is under development. The current version's graphical interface is designed to imitate Windows Vista. By means of the use of the open-source Wine compatibility layer, Linux XP can run some Windows programs. The current stable version of Linux XP is titled Linux XP Desktop 2008. Linux XP uses the GNOME desktop environment.

Similar to MS Windows, after installation, Linux XP has to be registered within a 30-Day trial period or the OS will deactivate.

Linux XP Desktop makes your computer virus-free, stable and dependable. You'll spend less time fixing your PC and more time using a standard well-known graphical interface to get work done.

    * The most user-friendly interface ever made for Linux
    * Simple and clear installation and Windows-style setup tools
    * Full set of applications for work in the Internet.
    * Support of Microsoft Office document formats (WORD, EXCEL and others)
    * Useful tools for working with Windows networks and VPN
    * Full control of your computer, data and applications
    * Stable, dependable and without any reinstallation
    * Absolutely virus-free environment
    * Free updates through a simple but useful interface (no RPM knowledge is required)

A set of Windows-like setup tools allows you to perform system management duties in a way that is familiar to you.

source:http://linuxpoison.blogspot.com/2008/09/135781757114615.html

tutorial - Setting up 2 IP address on "One" NIC (Redhat/Fedora)

STEP 1 (The settings for the initial IP address)
$ cat /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0
BOOTPROTO=static
BROADCAST=192.168.99.255
IPADDR=192.168.1.1
NETMASK=255.255.255.0
NETWORK=192.168.1.0
ONBOOT=yes

STEP 2 (2nd IP address: )
$ cat /etc/sysconfig/network-scripts/ifcfg-eth0:1

DEVICE=eth0:1
BOOTPROTO=static
BROADCAST=192.168.99.255
IPADDR=192.168.1.2
NETMASK=255.255.255.0
NETWORK=192.168.1.0
ONBOOT=yes

Note, in STEP 1 the filename is “ifcfg-eth0″, whereas in STEP 2 it’s “ifcfg-eth0:1″ and also not the matching entries for “DEVICE=…”. Also, obviously, the “IPADDR” is different as well.

source:http://linuxpoison.blogspot.com/2008/10/13578175718308.html

tutorial - OpenX adserver Installation and Configuration on openSuSe

OpenX is Open source software that helps publishers make more capital from online advertise. It is the most popular ad server key that puts control over online advertise back in the hands of publishers which is a open source software written in PHP using the Mysql database.

OpenX has 30,000 publishers using the software on 100,000 sites in 140 different cou"ntries and in 20 languages. The product enables web site administrators to rotate banners from both in-house advertisement campaigns as well as from paid or third-party sources, such as Google’s AdSense. Since OpenX is published under the GPL license, there is no cost to use the software. It is freely downloadable

Installation:
1) Download the OpenX from here
2) Unzip the package into your web directory : /src/www/htdocs
4) change the permission of the directory:

# chown -R wwwrun.www ./openx/

3) Create a new mysql database 'openx'

# mysql> create database openx;

4) Now go to -- http://server/openx, you should see something like ...

Click on "continue" and make sure you don't get any errors for PHP and Permissions

Database Configuration section:

Administration Configuration Section: Click on "continue" to set the administrator password

And Finally you should see:

Running: Finally login to your opnx system and start creating the campaign, advertiser, banners, user accounts, etc ...

source:http://linuxpoison.blogspot.com/2008/10/1357817571761.html

tutorial - Google Launches Linux Software Repositories

Google has just released the Google Linux Software Repositories, a centralized place where we can download and update the latest versions of all the tools that created by Google.

There are explanations for the installation of graphical environment for

Ubuntu 7.04 (Gutsy),

Debian GNU / Linux 4.0,

openSUSE 10.2,

Mandriva 2007 Spring

command line for

APT (Debian, Ubuntu ...)

YUM

urpmi (Mandriva)

YaST2 (SUSE)

RPM (Red Hat).

For more information and updates, you can join the Google Linux Repositories Help group.

source:http://linuxpoison.blogspot.com/2008/10/1357817571816.html

tutorial - Installation and Configuration - Jinzora Streaming Media Server on OpenSuse

Standard media players like iTunes, MusicMatch and Windows Media Player only allow you to manage your music and videos on a single computer.

Jinzora allows you to manage and access your media from any internet connected computer anywhere you are and provides a much richer set of tools to manage your collections.

Jinzora enables you to stream your digital media to any Internet connected computer, your home stereo set or a hardware jukebox device. Jinzora can organize and tag your music files and download album covers and reviews. More info: www.jinzora.com

Download and extract Jinzora
Download the latest version of Jinzora2 from http://en.jinzora.com/downloads and extract the contents using tar into your web directory.

# wget http://downloads.sourceforge.net/jinzora/jz275.tar.gz
# tar -zxvf jz275.tar.gz
# mv jz275 jinora

Setting up Jinzora
In the jinzora directory run

# sh configure.sh
# chown -R wwwrun.www ../jinzora

Run the installer
The installer will automatically configure jinzora, and create the database. Open up your webbrowser and go to http://localhost/jinzora/index.php and follow the instructions

Pay attentions to these setup steps:

Page 4 - Installation Type : Change from 'Streaming' to 'Streaming & Jukebox' if you wish to listen to the music on the computer you're installing Jinzora2 on (it's primarily a streaming application to allow remote access to, and control of, a streaming server running it).

Page 5 - Main Settings : If you hover over the boxes here, they explain the settings, so choose whatever you want. It's best to choose 'Database' for Backend Type. I'd also suggest using the 'Tag Data' option for 'Data Structure', unless your music is organized on your filesystem exactly the way you want it to be.

Page 6 - Backend Setup : Unless you've used Jinzora before, or for some reason wish to manually create a MySQL database for it to use, then select 'True' under 'Create Database'.

Page 7 - Import Media : This step may take a few minutes if you've got a few gigs of music; simply enter into the box the directory where your music is stored. When the installer's finished importing the music from this directory, you'll have the option to import as many other directories as you want, one after the other.

You can also import more files from the Settings interface when Jinzora is up and running. You don't have to do it while installing.

Running:
Open up your webbrowser and go to http://localhost/jinzora/index.php and you should see something like ...

Jinzora supports streaming of the following audio and video formats

Audio Types
MP3, Ogg, WMA, Midi, AAC, MP4, RM (RealAudio), M4A, WMA Lossless (via transcoding), WAV (via transcoding), Flac(via transcoding), MPC (via transcoding), WV (via transcoding), SHN (via transcoding)

Video Types
AVI, WMV, MPEG MOV

source:http://linuxpoison.blogspot.com/2008/08/135781757111170.html

Helix DNA Plugin: RealPlayer G2 Plug-In Compatible

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