Redhat Enterprise linux

FreeImage

abrazaq@gmail.com (Anonymous) — Fri, 29 Mar 2013 11:31:00 +0000

FreeImage is a library project for developers who would like to support popular graphics image formats (PNG, JPEG, TIFF, BMP and others). Some highlights are: extremely simple in use, not limited to the local PC (unique FreeImageIO) and Plugin driven!

Downlaod: FreeImage

FreeCAD 3D CAD modeler

abrazaq@gmail.com (Anonymous) — Fri, 29 Mar 2013 11:28:00 +0000

FreeCAD is a general purpose feature-based, parametric 3D modeler for CAD, MCAD, CAx, CAE and PLM, aimed directly at mechanical engineering and product design but also fits a wider range of uses in engineering, such as architecture or other engineering specialties. It is 100% Open Source and extremely modular, allowing for very advanced extension and customization.

FreeCAD is based on OpenCasCade, a powerful geometry kernel, features an Open Inventor-compliant 3D scene representation model provided by the Coin 3D library, and a broad Python API. The interface is built with Qt. FreeCAD runs exactly the same way on Windows, Mac OSX and Linux platforms.

Downlaod: FreeCAD 3D CAD modeler

FreeNAS 8.3.1

abrazaq@gmail.com (Anonymous) — Fri, 22 Mar 2013 05:55:00 +0000

Josh Paetzel has announced the release of FreeNAS 8.3.1, an open-source storage platform that supports sharing across Windows, Apple, and UNIX-like systems: "The FreeNAS development team is pleased to announce the immediate availability of FreeNAS 8.3.1-RELEASE. FreeNAS 8.3.1 is based on FreeBSD 8.3 with version 28 of the ZFS file system, and features volume based encryption for ZFS. There have been no major changes between 8.3.1-RC1 and RELEASE, mostly bug fixes and minor usability improvements to the GUI. Please familiarize yourself extensively with the encryption features of FreeNAS before using them. Doing the wrong thing can end up in a state where the volume is hidden behind very difficult-to-break AES 256 encryption. Many modern CPUs feature hardware support for encryption. If hardware support is available FreeNAS will use it.

Download: FreeNAS 8.3.1

ClearOS 6.4.0 Beta 2 "Community"

abrazaq@gmail.com (Anonymous) — Fri, 22 Mar 2013 05:53:00 +0000

Peter Baldwin has announced the release of the second beta of ClearOS 6.4 "Community" edition, a CentOS-based server, network and gateway operating system designed for homes, hobbyists and small organisations: "ClearOS Community 6.4.0 Beta 2 has arrived. Along with the usual round of bug fixes and enhancements, this release introduces a new reports engine, a storage manager, an anti-malware file scanner, RADIUS, a basic POP/IMAP server, mail retrieval (Fetchmail) as well as upstream proxy support. Over the last few weeks, there was a lot of focus on squashing bugs and improving little usability issues. From the modernized installer to the easy to use Marketplace, ClearOS 6 has matured to be our best offering. It's not only the core platform that has had a facelift, but also the individual apps and solutions. For example, Zarafa's solution with two great webmail interfaces, Outlook support, and out-of-the-box mobile synchronization.

Download: clearos-community-6.4beta2-x86_64.iso

openSUSE 12.3 RC2

abrazaq@gmail.com (Anonymous) — Fri, 01 Mar 2013 10:29:00 +0000

Jos Poortvliet has announced the availability of the second and final release candidate for openSUSE 12.3: "The openSUSE release team has released RC2 to the mirrors a few hours ago. A large number of bugs have been fixed and a number of packages have been updated. Major changes include PulseAudio, the kernel and Firefox. This is the last opportunity to find and fix the last few bugs before the final release." Please do note that the openSUSE live images no longer fit on a 600 MB CD: "Starting with openSUSE 12.3, we have changed the structure of the live GNOME and KDE media. The live images are now designed to be written to, booted and installed from a USB disk rather than a CD; consequently, they are now about a GB each

Download: openSUSE-12.3-GNOME-Live-Build0094-x86_64.iso

Red Hat Enterprise Linux 6.4 Released

abrazaq@gmail.com (Anonymous) — Fri, 22 Feb 2013 10:51:00 +0000

Red Hat, Inc. has announced the release of Red Hat Enterprise Linux (RHEL) 6.4, the latest update of the company's enterprise-class operating system: "Red Hat, Inc., the world's leading provider of open source solutions, today announced general availability of the next minor release of Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 6.4. It has been optimized for performance, stability and flexibility, and designed to help organizations manage their workloads across physical, virtual and cloud environments. Red Hat Enterprise Linux introduces several new components that help enterprises meet these core business objectives. Red Hat has collaborated with its partners and the upstream community on the parallel Network File System (pNFS) industry standard.

Ubuntu for Android Phones

abrazaq@gmail.com (Anonymous) — Wed, 20 Feb 2013 11:53:00 +0000

What is Ubuntu for Android?

How would you like a PC that fits in your pocket? For the lowdown on Ubuntu for Android, in terms your grandma could understand, watch this short video. And for news on Ubuntu for Android products, watch this space.

The full PC desktop for multi-core Android phones

Now multi-core Android phones can be PCs too. Ubuntu for Android enables high-end Android handsets to run Ubuntu, the world’s favourite free PC desktop operating system. So users get the Android they know on the move, but when they connect their phone to a monitor, mouse and keyboard, it becomes a PC.

See more: Ubuntu for Android

OpenSUSE 12.3 RC1

abrazaq@gmail.com (Anonymous) — Sat, 09 Feb 2013 15:13:00 +0000

Jos Poortvliet has announced the availability of the first release candidate for openSUSE 12.3, scheduled for final release on 13 March, is out and ready for testing: "The openSUSE project would like to announce the first release candidate of version 12.3 of its popular Linux distribution. Major updates include the KDE desktop environment 4.10, GNOME 3.6 and Linux kernel 3.7.6. This preview includes a large number of fixes made to Factory since the beta, as well as the last major set of version updates. RC1 needs a real workout to ensure we fix any remaining issues in time, so don't wait for RC2, put it on your spare disk and give it a try now. Major changes include: PackageKit 0.8.7, Apper 0.8, fcitx 4.2.7, MariaDB replaces MySQL.

Download: openSUSE 12.3 RC1

Linux Deepin 12.12 Alpha

abrazaq@gmail.com (Anonymous) — Tue, 29 Jan 2013 11:25:00 +0000

A preview version of Linux Deepin 12.12, a popular Chinese community distribution, has been unleashed for testing. This is the first version that ships with the brand new Deepin Desktop Environment (DDE), which replaces GNOME Shell as the default desktop. DDE along with its Deepin System Settings (DSS) is regarded as a milestone for the Deepin project. DSS is implemented with the Deepin UI library and it features automatic screen brightness adjustment, support for the Chinese lunar calendar, convenient network configuration, and so on. Also included in Deepin 12.12 Alpha is Deepin Software Center 3.0 Alpha, where the software applications are reorganized with better classification. Multimedia utilities for video and audio playback as well as screenshots have been upgraded to new versions for testing.

Download: Linux Deepin 12.12 Alpha

SystemRescueCd 3.3.0

abrazaq@gmail.com (Anonymous) — Sat, 26 Jan 2013 15:09:00 +0000

François Dupoux has released an updated build of SystemRescueCd, version 3.3.0. SystemRescueCd is a Gentoo-based live CD with an extensive collection of data rescue and disk management utilities. The project's changelog reports the following new features and improvements: "Standard kernels are the long-term supported Linux 3.4.27 (rescuecd and rescue64); alternative kernels updated to latest stable 3.7.4 (altker32 and altker64); fixed 'waiting for uevents to be processed' by upgrading udev to 197-r4; updated XFS file system utilities: - xfsprogs 3.1.10 and xfsdump 3.1.2; updated dar 2.4.9 (Disk Archive 2.4.9); added grsync 1.1.1 (a GTK+ frontend to rsync); added fuse-exfat 1.0.0 (exFAT file system FUSE module); fixed Network-Manager applet in the graphical environment; re-based genkernel on latest upstream version; updated NTFS-3G to 2013.1.13.

Downlaod: SystemRescueCd 3.3.0

How to Install Binary Files and Scripts (.BIN/.SH)

abrazaq@gmail.com (Anonymous) — Sun, 20 Jan 2013 11:26:00 +0000

Binary files such as (.BIN) and shell scripts (.SH) are another popular format for distributing applications, particularly in the commercial, closed-source world. A good example of this are the Quake 3 and Doom 3 games from id Software. Basically all these files are is a list of commands that are run inside a terminal to copy, move, and create files in your file system. You can run these files like so:

For BIN files:
1. Make sure the file is set to "executable" by running this command:
chmod +x xyz.bin
2. Run the file like this:
./xyz.bin

NOTE: If the installer requires access to directories outside of your /home/ directory, you may need to log in as root before you can execute these commands successfully. That can be accomplished with the su command, followed by your root (Administrator) password. Ubuntu users will use sudo and their regular user password instead.

For .SH files:
1. Make sure the file is executable by following Step 1 above.
2. Run the file either with the same command as the previous Step 2, or like this:

sh xyz.sh

openSUSE 12.3 Beta 1 Released

abrazaq@gmail.com (Anonymous) — Fri, 18 Jan 2013 05:46:00 +0000

The first beta of the upcoming openSUSE Linux 12.3, scheduled for final release on 13 March, is out and ready for testing: "According to plan, today openSUSE 12.3 beta sees the light. The beta comes with mostly smallish changes as we're in serious testing waters now – we hope you're out there to help us clear the way to the final release. The beta comes with 4.10 RC2 of KDE's workspaces and applications. KDE has announced a third RC due to some late changes and this version is part of a testing sprint organized by the KDE Quality team. openSUSE KDE packagers have build a special live image to test this release but we urge you to get the beta packages from software.opensuse.org as they are of course newer.

Download: openSUSE-KDE-LiveCD-Build0348-x86_64.iso - openSUSE-GNOME-LiveCD-Build0348-x86_64.iso

Fedora 18 Final Relase

abrazaq@gmail.com (Anonymous) — Thu, 17 Jan 2013 11:12:00 +0000

Fedora 18, the latest stable version of the Red Hat-sponsored community distribution of Linux, has finally arrived: "The Fedora project is incredibly delighted to announce the release of Fedora 18. What's new? The user interface for Fedora's installation software, Anaconda, has been completely re-written from the ground up. Making its debut in Fedora 18, the new UI introduces major improvements to the installation experience. It uses a hub-and-spoke model that makes installation easier for new users, offering them concise explanations about their choices. Advanced users and system administrators are of course still able to take advantage of more complex options. The general look and feel of the installation experience has been vastly upgraded, providing modern, clean, and comprehensible visuals during the process.

Download:
Fedora 18 x86_64 DVD
Fedora-18-i386-DVD
Fedora-18-x86_64-Live-KDE
Fedora-18-source-DVD
Fedora-18-i686-Live-KDE
Fedora-18-i686-Live-Desktop
Fedora-18-x86_64-Live-Desktop

CentOS 5.9 Released

abrazaq@gmail.com (Anonymous) — Thu, 17 Jan 2013 11:05:00 +0000

Karanbir Singh has announced the release of CentOS 5.9, a Linux distribution built from the source code of the recently-released Red Hat Enterprise Linux (RHEL) 5.9: "We are pleased to announce the immediate availability of CentOS 5.9 for i386 and x86_64 architectures. New features: the UOP added native MySQL support to Postfix, you might consider moving from the postfix-mysql package from the centosplus repo to this package if you are using the centosplus package only for MySQL support; java-1.7.0-openjdk (Java 7) support has been added in CentOS-5.9, java-1.6.0-openjdk (Java 6) is also still available and most things java in the distribution still use Java 6; ant17 (Ant 1.7.0) has been added to CentOS-5.9, the older ant (Ant 1.6.5) is also still available; Microsoft Hyper-V drivers have been added to allow CentOS to be more efficient as a virtual machine when installed on Microsoft Hyper-V server.

Download: CentOS-5.9-x86_64-bin-DVD-1of2.iso , CentOS-5.9-x86_64-bin-DVD-2of2.iso

How to INSTALLING SOFTWARE RPM

abrazaq@gmail.com (Anonymous) — Wed, 16 Jan 2013 07:48:00 +0000

RPM stands for RedHat Package Management, but is pretty universal and used in modern linux Distro's. In many cases a simple click on the RPM icon will open a GUI for easy installation. Sometimes you can even do a test-install to see if all dependencies are correct.

For the commandline we have: ( assuming we want to install samba-2.2.1a-4 )

# rpm -ihv   samba-2.2.1a-4.rpm ( Will install the package )
# rpm -Uhv samba-2.2.1a-4.rpm   ( Will upgrade the package )
# rpm -e samba-2.2.1a-4.rpm   ( Delete the package )
# rpm -l samba-2.2.1a-4.rpm   ( Will list the files in the package )
# rpm -ql samba-2.2.1a-4.rpm ( Will list the files and state the installed version of the package )
Imagine the install returns that there are some libs missing, and you know for sure that they are there: In most cases you can force an install, or tell it to ignore dependencies.

# rpm -ihv   samba-2.2.1a-4.rpm --force
# rpm -ihv   samba-2.2.1a-4.rpm --nodeps

Upgrading:
First have a look what's installed,
# rpm qa | grep samba

This will return,
samba-common-2.2.1a-4
samba-client-2.2.1a-4
samba-2.2.1a-4

uninstall. ( Leave the dependencies as they are )

# rpm -e samba-common-2.2.1a-4 --nodeps
# rpm -e samba-client-2.2.1a-4 --nodeps
# rpm -e samba-2.2.1a-4 --nodeps

install the upgrade, ( With or without --force or --nodeps )

# rpm -ihv samba-2.2.7-3.7.2.rpm
# rpm -ihv samba-client-2.2.7-3.7.2.rpm
# rpm -ihv samba-common-2.2.7-3.7.2.rpm

Red Hat Enterprise Linux 5.9

abrazaq@gmail.com (Anonymous) — Sat, 12 Jan 2013 18:14:00 +0000

The legacy 5.x branch of Red Hat Enterprise Linux (RHEL) has moved to version 5.9, incorporating all recent feature and security updates: "Red Hat, Inc. today announced the next minor release of Red Hat Enterprise Linux 5, Red Hat Enterprise Linux 5.9. This release marks the beginning of Production Phase 2 of Red Hat Enterprise Linux 5 and demonstrates the company's continuing effort to promote stability and the preservation of customers' investments in the platform. It maintains Red Hat's commitment to a 10-year life cycle through the introduction of several new features, including hardware enablement, security, standards and certifications, developer tools, virtualization, and more. As with all minor releases, Red Hat Enterprise Linux 5.9 maintains backwards compatibility with hardware and software platforms across the life cycle of Red Hat Enterprise Linux 5.

Download: download center

The Difference of SU AND ROOT

abrazaq@gmail.com (Anonymous) — Fri, 11 Jan 2013 11:59:00 +0000

There have been many questions about, what is the difference between “su” and “root” . . well, the difference is minimal but still very important.

As you login as “root” right from booting the system, all the privileges are set to root, what makes your system more vulnerable to your own mistakes and those wishing to enter your system.
As you login as normal user, the privileges are limited, thus it´s safer. To be able to do administrative tasks you can temporally login as root using “su” in a console/terminal, that way the root privileges are limited to the actions you do in the console. So the rest of the system is still in “normal user” mode, and this makes it safer.
We do use the same password for “su” and “root”, but once you are logged in as normal user, typing “root” in terminal will only give you “bash: root: command not found”.

The software Installation of (configure, make, make install)

abrazaq@gmail.com (Anonymous) — Thu, 10 Jan 2013 08:57:00 +0000

This tutorial is for those who have just started using Linux. Generally when users from the Windows background enter the Linux world, they are totally stumped by the software installation method. They were used to the luxury of double clicking on a single file and getting their software installed. But now they have to type cryptic commands to do the same.

Though the installation instructions tell them what to do, they have no idea what those steps actually do. This article shall explain the basics of software installation. After reading this article you would feel more at home when installing your next software.

Generally beginners tend to search desperately for RPMs since installing RPMs is a real simple task. But this article doesn't talk about RPMs. It deals with the software’s that you generally get in the zipped formats as tarballs.

Details:

Generally you would get Linux software in the tarball format (.tgz) this file has to be uncompressed into any directory using tar command. In case you download a new tarball by the name xyz.tgz, then you would have to type the following command

$ tar xfvz xyz.tgz

This would create a directory within the current directory and unzip all the files within that new directory. Once this is complete the installation instructions ask you to execute the 3 commands: configure, make & make install. Most of the users do this and successfully install their softwares. But most of the newbies have no idea what this really does. The rest of the article shall explain the meaning of these 3 commands.

Each software comes with a few files which are solely for the purpose of installation sake. One of them is the configure script. The user has to run the following command at the prompt

$ ./configure

The above command makes the shell run the script named ' configure ' which exists in the current directory. The configure script basically consists of many lines which are used to check some details about the machine on which the software is going to be installed. This script checks for lots of dependencies on your system. For the particular software to work properly, it may be requiring a lot of things to be existing on your machine already. When you run the configure script you would see a lot of output on the screen , each being some sort of question and a respective yes/no as the reply. If any of the major requirements are missing on your system, the configure script would exit and you cannot proceed with the installation, until you get those required things.

The main job of the configure script is to create a ' Makefile ' . This is a very important file for the installation process. Depending on the results of the tests (checks) that the configure script performed it would write down the various steps that need to be taken (while compiling the software) in the file named Makefile.

If you get no errors and the configure script runs successfully (if there is any error the last few lines of the output would glaringly be stating the error) then you can proceed with the next command which is

$ make

' make ' is actually a utility which exists on almost all Unix systems. For make utility to work it requires a file named Makefile in the same directory in which you run make. As we have seen the configure script's main job was to create a file named Makefile to be used with make utility. (Sometimes the Makefile is named as makefile also)

make would use the directions present in the Makefile and proceed with the installation. The Makefile indicates the sequence that Linux must follow to build various components / sub-programs of your software. The sequence depends on the way the software is designed as well as many other factors.

The Makefile actually has a lot of labels (sort of names for different sections). Hence depending on what needs to be done the control would be passed to the different sections within the Makefile Or it is possible that at the end of one of the section there is a command to go to some next section.

Basically the make utility compiles all your program code and creates the executables. For particular section of the program to complete might require some other part of the code already ready, this is what the Makefile does. It sets the sequence for the events so that your program does not complain about missing dependencies.

One of the labels present in the Makefile happens to be named ' install ' .

If make ran successfully then you are almost done with the installation. Only the last step remains which is

$ make install

As indicated before make uses the file named Makefile in the same directory. When you run make without any parameters, the instruction in the Makefile begin executing from the start and as per the rules defined within the Makefile (particular sections of the code may execute after one another..thats why labels are used..to jump from one section to another). But when you run make with install as the parameter, the make utility searches for a label named install within the Makefile, and executes only that section of the Makefile.

The install section happens to be only a part where the executables and other required files created during the last step (i.e. make) are copied into the required final directories on your machine. E.g. the executable that the user runs may be copied to the /usr/local/bin so that all users are able to run the software. Similarly all the other files are also copied to the standard directories in Linux. Remember that when you ran make, all the executables were created in the temporary directory where you had unzipped your original tarball. So when you run make install, these executables are copied to the final directories.

Parsix GNU/Linux 4.0R1

abrazaq@gmail.com (Anonymous) — Wed, 02 Jan 2013 10:33:00 +0000

The honour of the first release announcement of 2013 goes to Parsix GNU/Linux, a distribution based on Debian's testing branch and featuring the GNOME 3 desktop: "The updated 4.0r1 version has been synchronized with Debian's testing repositories as of December 29, 2012 and brings lots of updated packages compared to Parsix 3.7 aka Raul. Parsix Gloria is project's first release with the GNOME 3 series and ships with LibreOffice productivity suite by default. Gloria has a brand-new software manager package. Highlights: GNOME 3.4.2, X.Org 7.7, GRUB 2, GNU Iceweasel 17.0.1, GParted 0.12.1, Empathy 3.4.2.3, LibreOffice 3.5.4, VirtualBox 4.1.18 and a brand-new kernel based on Linux 3.2.35 with TuxOnIce 3.3, BFS and other extra patches. The live DVD has been compressed using Squashfs and xz. Main changes are: X.Org Server 1.12.4, glibc 2.13, GIMP 2.8.2, Grisbi 0.8.9, VLC 2.0.5, xFarDic 0.11.7.

Download:Parsix 4.0R1-i386 Parsix 4.0R1-x64

Dovecot installation and configuration

abrazaq@gmail.com (Anonymous) — Wed, 02 Jan 2013 07:57:00 +0000

Dovecot is an open-source IMAP and POP3 server application which was designed specifically for Linux/Unix Operating Systems. Dovecot retrieves emails from Postfix and delivers them to the relevant mailbox on the server.

You can get your mail through Dovecot using either of the POP3 or IMAP protocols.

Installation

The first thing we will need is to download the Dovecot package. This command will install it:

#yum install dovecot

Configuring Dovecot

The next step is to configure the Dovecot services in the config file at /etc/dovecot/dovecot.conf - use whatever editor you like for the task.

#nano /etc/dovecot/dovecot.conf

The following lines will need to be uncommented and if necessary changed to reflect your plans for the environment:

protocols = imap pop3

mail_location = maildir:~/Maildir

Starting Dovecot

Once we have finished the mailbox creation we will need to make sure the Dovecot application will be run with the server upon restart. We'll use the chkconfig command for that purpose.

#chkconfig --level 345 dovecot on

The final step for Dovecot to be completed is to start the service.

#service dovecot start

FreeBSD 9.1

abrazaq@gmail.com (Anonymous) — Tue, 01 Jan 2013 06:00:00 +0000

FreeBSD 9.1 has been released: "The FreeBSD Release Engineering team is pleased to announce the availability of FreeBSD 9.1-RELEASE. This is the second release from the stable/9 branch, which improves on the stability of FreeBSD 9.0 and introduces some new features. Some of the highlights: new Intel GPU driver with GEM/KMS support; netmap(4) fast userspace packet I/O framework; ZFS improvements from Illumos project; CAM Target Layer, a disk and processor device emulation subsystem; optional new C++11 stack including LLVM libc++ and libcxxrt; jail devfs, nullfs, zfs mounting and configuration file support; POSIX2008 extended locale support, including compatibility with Darwin extensions; oce(4) driver for Emulex OneConnect 10Gbit Ethernet card.

Download: FreeBSD-9.1-RELEASE-i386-dvd.iso FreeBSD-9.1-RELEASE-amd64-dvd1.iso

Postfix Pre-Installation on RHEL

abrazaq@gmail.com (Anonymous) — Mon, 31 Dec 2012 09:30:00 +0000

Postfix Pre-Installation Steps

Sendmail Stop

The first step before installing Postfix is to make sure that Sendmail is not already running on your system. You can check for this using the following command:

#/sbin/service sendmail status

If sendmail is not running the following output will be displayed:

#sendmail is stopped

If sendmail is running you will see the following:

#sendmail (pid 2138) is running

If sendmail is running on your system it is necessary to stop it before installing and configuring Postfix. To stop sendmail run the following command as super user:

#/sbin/service sendmail stop

The next step is to ensure that sendmail does not get restarted automatically when the system is rebooted. The first step is to find out which run levels will automatically start sendmail. To do this we can use the chkconfig command-line tool as follows:

#/sbin/chkconfig --list | grep sendmail

The above command will typically result in output similar to:

sendmail 0:off 1:off 2:on 3:on 4:on 5:on 6:off

This means that if the system boots into runlevels 2, 3, 4 or 5 then the sendmail service will automatically start. To turn off sendmail we can once again use the chkconfig command as follows:

#/sbin/chkconfig sendmail off

The chkconfig tool defaults to changing the settings for runlevels 2, 3, 4 and 5. You can configure for specific runlevels using the –levels command line option if necessary.

To verify the settings run chkconfig one more time as follows:

#/sbin/chkconfig --list | grep sendmail

And check that the output is as follows:

sendmail 0:off 1:off 2:off 3:off 4:off 5:off 6:off

Sendmail is now switched off and configured so that it does not auto start when the system is booted. We can now move on to installing Postfix.

Installing Postfix on RHEL

By default, the RHEL installation process does not install Postfix. To verify if Postfix is already installed, use the following rpm command in a Terminal window or if you use remote system use putty software:

#rpm -q postfix

If rpm reports that postfix is not installed, it may be installed as follows:

#su -

#yum install postfix

The yum tool will download and install postfix, and configure a special postfix user in the /etc/passwd file.

Configuring Postfix

The main configuration settings for Postfix are located in the /etc/postfix/main.cf file. There are many resources on the internet that provide detailed information on Postfix so this section will focus on the basic options required to get email up and running.

The key options in the main.cf file are:

myhostname = redhatent.domain.com

mydomain = domain.com

myorigin = $myhostname

inet_interfaces = $myhostname

Other settings will have either been set up for you by the installation process or are not needed unless you are feeling adventurous and want to configure a more sophisticated email system.

The format of myhostname is host.domain.extension. For example if your Linux system is called “redhatent” and your internet domain is MyDomain.com you would set the myhostname option as:

myhostname = redhatent.mydomain.com

The mydomain setting is just the domain part of the above setting. For example:

mydomain = mydomain.com

The myorigin and inet_interfaces options use the settings we have just created so do not need to be changed (although the inet_interfaces may be commented out by default so you should remove the # at the beginning of this particular line in the main.cf file).

Starting Postfix on an RHEL System

Once the /etc/postfix/main.cf file is configured with the correct settings it is now time to start up postfix. This can be achieved from the command line as follows:

#/usr/sbin/postfix start

The postfix process should now start up. The best way to check that everything is working is to check your mail log. This is typically in /var/log/maillog and should now contain an entry that looks like:

Nov 21 13:05:46 redhatent postfix/postfix-script: starting the Postfix mail system Nov 21 13:05:46 redhatent

postfix/master[10334]: daemon started -- version 2.2.5, configuration /etc/postfix

As long as you don't see any error messages you have successfully installed and started Postfix and you are ready to set up a mail client and start communicating with the outside world.

To configure Postfix to start automatically at system startup, run the following command in a Terminal window:

#/sbin/chkconfig --level 345 postfix on

“If I missed something in the configuration of postfix please let me know”

Finnix 107

abrazaq@gmail.com (Anonymous) — Sat, 29 Dec 2012 08:33:00 +0000

Ryan Finnie has announced the release of Finnix 107, a small, self-contained, bootable Linux CD distribution for system administrators, based on Debian's testing branch: "Today I am pleased to announce the release of Finnix 107, only two months from the previous release, but packed with new functionality and bug fixes. Finnix 107 includes Linux kernel 3.6, and includes a fix for the (overhyped, it seems) ext4 corruption bug. Average Finnix startup times have been reduced even further by the cleanup of legacy code. In addition, the shutdown procedure, which largely has not changed in years, got a revamp and is now noticeably quicker. The x86 ISO is now being built with the isohybrid method, meaning you can now write the ISO directly to a USB flash drive at the block level to boot it.

Download: finnix-107 free Download

NetBSD 6.0.1

abrazaq@gmail.com (Anonymous) — Sat, 29 Dec 2012 08:32:00 +0000

Jeff Rizzo has announced the release of NetBSD 6.0.1, the first security and bug-fix update of the project's 6.0 branch: "The NetBSD project is pleased to announce NetBSD 6.0.1, the first security and bug-fix update of the NetBSD 6.0 release branch. It represents a selected subset of fixes deemed important for security or stability reasons. Please note that all fixes in security and bug-fix updates (i.e., NetBSD 6.0.1, 6.0.2, etc.) are cumulative, so the latest update contains all such fixes from the corresponding minor release (in this case, 6.0). Major changes: posix_spawn() - fix processes with attributes; resolve races between vget() and vrele() resulting in vget() returning dead vnodes.

Download: NetBSD 6.0.1 free Download

Calculate Linux 13

abrazaq@gmail.com (Anonymous) — Sat, 29 Dec 2012 08:31:00 +0000

Alexander Tratsevskiy has announced the release of Calculate Linux 13, a Gentoo-based distribution for desktops and servers: "We are proud to announce the final release of Calculate Linux 13. Main changes and fixes: meta-packages are no longer used to manage default dependencies; Portage files will be unpacked when booting for the first time; better identification of NTFS partitions; fixed the user profile configuration for VMware; Composite enabled by default for VMware; should you want to replace main applications, their launch icons will be created correctly; in case the user modified the local Portage overlay repositories, those can now be restored; Calculate Utilities were updated to 3.1; full French translation now available.

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