Free system that runs software for linux

WyattERP short from Enterprise Resource Planning means total business management software, designed to handle every aspect of your business from contact management to sales/orders, fulfillment to shipping, invoicing to accounting, from vendor management to purchase orders, receiving to inventory, human resources to payroll, in one fully integrated solution.

Traditionally, there have been three methods to achieve a true ERP. Grow your own software from scratch, try to integrate a diverse set of existing commercial applications, or pay for a commercial ERP system.

Off-the-shelf ERP systems always seem to have a pre-determined set of business rules in mind. The problem is, they may not fit your business. So either you change the way you do business, or the ERP may not work right for you.

Integrating existing applications seems like the easiest way to get a custom solution, but it is much harder than it sounds. Each application typically has its own way of storing data, its own API, and its own operational methodology. Furthermore, application providers seldom make it easy to get into the internals of their application--a must for a true integration project. And when applications are not seamlessly integrated across the business, it makes it difficult-to-impossible to query data across a wide range of sources and parameters.

Growing your own software seems the only way to achieve true custom integration. But the size of the task has made it next-to-impossible for all but the largest enterprises. Companies have emerged claiming to be able to produce a custom solution for you, but it seldom works out as good as it sounded in the sales presentation. And more troubling, you get left with a product your own people dont know how to maintain or extend. You are locked into your original provider for ever whether you like it or not.

WyattERP has released a set of tools created for the purpose of making it possible for even a small enterprise to develop its own fully-functioning ERP system. Your own IT people can learn to use WyattERP tools to make a database-driven system to run every aspect of your business. You can design your own system that runs according to your companys way of doing business. You will own and understand your design so you can maintain and extend it as much as you like.

Wylib and Wyseman are open source tools used for creating fully customizable, affordable ERP solutions on a Linux platform using the PostgreSQL database backend and the Tcl scripting language. Wylib provides an easy to use, robust, application framework. Wyseman provides a way to create database models using user defined schema files. Wylib and Wyseman interact with the PostgreSQL database to provide a starting point for a seamless ERP solution.

Wylib and Wyseman are released under two licensing options. This dual license allows for a fair exchange, or Quid pro Quo, to take place between the licensee (you) and the licensor (WyattERP). The source code for Wylib and Wyseman is identical for both licenses.

GFS (Global File System) is a cluster file system. It allows a cluster of computers to simultaneously use a block device that is shared between them (with FC, iSCSI, NBD, etc...). GFS reads and writes to the block device like a local filesystem, but also uses a lock module to allow the computers coordinate their I/O so filesystem consistency is maintained. One of the nifty features of GFS is perfect consistency -- changes made to the filesystem on one machine show up immediately on all other machines in the cluster.

GFS consists of a set of kernel patches and userspace programs.
The GFS lock module lock_dlm depends on CMAN and DLM.
The GFS lock module lock_gulm depends on GULM.
The GFS lock module lock_nolock depends on nothing.
Some GFS tools depend on the iddev library.

Building and Installing

1. build and install from cluster tree
cd cluster
./configure --kernel_src=/path/to/kernel
make; make install

- This builds and installs kernel modules, libraries and user programs.

- Kernel modules can also be built within the original kernel source tree by applying the kernel patches from cman-kernel/patches, dlm-kernel/patches and gfs-kernel/patches.

2. build device mapper user space
cd device-mapper
./configure
make; make install

3. build lvm2/clvm
cd LVM2
./configure --with-clvmd --with-cluster=shared
make; make install
LVM2/scripts/clvmd_fix_conf.sh /usr/lib

Load kernel modules

depmod -a
modprobe dm-mod
modprobe gfs
modprobe lock_dlm

Modules that should be loaded: lock_dlm, dlm, cman, gfs, lock_harness and dm-mod if device-mapper was built as a module.

Startup procedure

Run these commands on each cluster node:

> ccsd - Starts the CCS daemon
> cman_tool join - Joins the cluster
> fence_tool join - Joins the fence domain (starts fenced)
> clvmd - Starts the CLVM daemon
> vgchange -aly - Activates LVM volumes (locally)
> mount -t gfs /dev/vg/lvol /mnt - Mounts a GFS file system

Shutdown procedure

Run these commands on each cluster node:

> umount /mnt - Unmounts a GFS file system
> vgchange -aln - Deactivates LVM volumes (locally)
> killall clvmd - Stops the CLVM daemon
> fence_tool leave - Leaves the fence domain (stops fenced)
> cman_tool leave - Leaves the cluster
> killall ccsd - Stops the CCS daemon

The Manhattan Virtual Classroom is a stable, fast and effective course management system that runs on Linux and other Unix-like systems.
Its written entirely in the C programming language (fast! - light hardware requirements) and is 100% database-free (no MySQL administration, no tuning issues- simple!) Manhattan supports thousands of users at its Western New England College home, and at other colleges and schools around the world.
Its one of the best-kept secrets of the online learning world - a course management system "for the rest of us".
Main features:
- Provide your students with handouts, notices, lecture materials, interactive self-tests, and web sites to visit.
- Assign homework for your students to complete, receive the work they do in response to those assignments, and provide feedback.
- Issue multiple-choice, True/False, and short answer exams.
- Issue more involved exams where the students are expected to do their work offline, and submit their responses in the form of a word processing, spreadsheet, or other type of file(s).
- Exchange private messages with your students.
- Host discussions with the entire class, or with teams of students.
- Keep students apprised of their grades.
- Issue surveys to your students and collect the results.
- Engage in live online "chats" with your students.
- Track which students are using the system and when.

QtEmu is a graphical user interface for QEMU written in Qt4. It has the ability to run virtual operating systems on native systems. This way you can easily test a new operating system or try a Live CD on your system without any troubles and dangers.
This project has been tested on Linux and Windows (2k, XP).
Enhancements:
Features:
- Manifest file added in order to see everywhere Win styles (e.g. file dialogs) (patch by Cristian Adam)
- French translation by Fathi Boudra. Thanks!
- Italian translation by Gianluca Cecchi. Thanks!
- Add confirmation before closing a machine. Also inform the user that he can open the machine again.
- Add information about possible performance loose with seamless mouse mode.
- Add support for icon themes.
- Add KDE Oxygen icon theme. QtEmu fits now better in a KDE4 desktop. Please see images/oxygen/COPYING for license information.
Fixes:
- Allow compilation with Qt 4.1 again. Patch by Mandrake.

Sentry Firewall CD-ROM is a Linux-based bootable CDROM suitable for use as an inexpensive and easy to maintain firewall, server, or IDS(Intrusion Detection System) Node. The system is designed to be immediately configurable for a variety of different operating environments via a configuration file located on a floppy disk, a local hard drive, and/or a network via HTTP(S), FTP, SFTP, or SCP.
The Sentry Firewall CD is a complete Linux system that runs off of an initial ramdisk, much like a floppy-based system, and a CD. The default kernel is a current 2.4.x series kernel with various Netfilter patches applied. An OpenWall-patched current 2.2.x kernel is also available on the CD.
Booting from the CDROM is a fairly familiar process. The BIOS execs the bootloader(Syslinux) - which then displays a bootprompt and loads the kernel and ramdisk into memory. Once the kernel is running, the ramdisk is then mounted as root(/). At this point our configuration scripts are run(written in perl) that configure the rest of the system. It is the job of these configure scripts to put the various startup and system files into the proper location using either what is declared in the configuration file(sentry.conf) or the system defaults located in the /etc/default directory.
Most of the critical files used at boot time can be replaced with your own copy when declared in the configuration file. This is essentially how we allow the user to configure the system using his/her own configuration and init files.
All of the binaries, files, scripts, etc, used to create the CD-ROM are also available on the CD-ROM. So, with a little practice, you can easily build and customize your own bootable Sentry Firewall CD.
Main features:
- Current Linux Kernel: 2.4.28-ow1
- OpenWall security patch(-ow1).
- StrongSwan.
- Ebtables bridge+netfilter patch.
- Linux-WLAN modules.
- MPPE patch.
- Modules-off patch [ More Info | Patch ]
- iptables v1.2.11.
- ebtables v2.0.6.
- OpenVPN.
- IProute2 utilities.
- Vconfig.
- PPTP Client/Server.
- Zebra
- Snort IDS v2.2.0
- Scanlogd
- OpenSSH and OpenSSL
- net-snmp
- Webmin
- NMap
- Many other daemons and binaries you may need -- Apache, Sendmail, Squid, Perl, BIND (static/chroot), and more.

Memorize word Flashcard System is a Leitner Flashcard English learning tool.
Memorize Words Flashcard System was originally based on the idea of jMemorize although it is totally new written code with much more features and specially designed to learn words rather than being a general purpose flashcard program.
Main features:
- Creating multimedia cards with sounds and pictures.
- Learn cards randomly from a basket which can be created from expired, learned and unlearned cards.
- Start a time based and/or card based learning sessions.
- Automatically retrieving cards meanings from Internet (Merriam-Webster Dictionary)
- Automatically retrieve any words pronunciations in a audio format from Internet.
- You can decide to include pictures from Google image search results which are of course related to the word. (Can you imagine how much this visualization feature will help you learn the new language faster and easier?!)
- It automatically retrieve English sentences from internet which have used the desired word and then shows them in your learning process as practical words usage examples.
- You can categorize the cards.
- You can set the expiration date of the cards based on their current learning position.
- This program has been written in Java and therefore could be run in any operation system with JRE 1.5+
- and much much more.