Getting acquainted with Joli OS

But it starts at the top. In many ways, Linux and UNIX administration is today much easier than administration for popular commercial personal operating systems because it is much more transparent. It stands to affect the people of the world at least as profoundly as the Industrial Age. Multiprocessing is …

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Quick and easy fixes using mail

Developing the core is pretty serious business, involving pretty serious computer science. But the existence and popularity of the Windows Subsystem for Linux (WSL), as well as more recently announced capabilities like the Windows port of Docker, including LCOW (Linux containers on Windows) support, are evidence of the impact that …

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Installing a web server under Cub Linux

As the writing process writes to the pipe, bytes are copied into the shared data page and when the reading process reads from the pipe, bytes are copied from the shared data page. To make it easy to find, the current, running, process is pointed to by the current pointer …

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Here's what no-one tells you about objcopy

There are no set boundaries or any limitations. The visibility and easy access to the source code, which I mentioned earlier, can also be a double-edged sword as bad-intentioned people can find vulnerabilities and leave backdoors for future exploits. Processes begin life as executable object code, which is machine-runnable code …

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Can a distro make the difference?

Physical filesystems reside on block storage devices, such as CDs, floppy disks, compact flash cards, or hard drives. Today open source software has become critical for almost every organization. If you love the rolling Linux distributions (here are some fixed vs rolling release differences), then you don't need to look …

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Fall in love with atq

Behavior changes and features are added. Aliases are expanded when the function definition is read, not when the function is executed, because a function definition is itself a compound command. As long as the system appears to be free of critical or oft-manifesting bugs, it is considered ``stable' and new …

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Old school Linux with the telnet utility

In the Linux world, a large number of users will always prefer to compile applications from source, rather than using an installer package. Outsource open source software development to O2I and benefit from high-quality services at a cost-effective price. However, that can leave your Linux system vulnerable to attack, and …

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Actionable tips for mastering inotify-tools

This is used by gateways, which respond to ARP requests on behalf of IP addresses that are in the remote network. Many, if not most, PCI modems available on store shelves these days are WinModems. This means that subsequent INET socket calls can easily retrieve the sock data structure. Figure …

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Fundamentals of libpipeline

It is time for the opening of the tools that will be needed to build this new age. The physical on-disk form of this mapping-for example, a simple table or a hash-is implemented and managed by the kernel code that supports a given filesystem. The reality is that not only …

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How to automate git-series

Every process except the first has a parent. So, if the operation value is 2, then -2 is added to the adjustment entry for this semaphore. It is as old as computers themselves. What does this mean to you?

At the Linux terminal with Firejail

They should not be held …

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Learn mesg to further your career

Each device driver tells the operating system how to use that specific device. The process tree is rooted at the first process, known as the init process, which is typically the init program. By and throughout the 1990s, you could find MINIX installations thriving in universities worldwide-and a young Linus …

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Create your own video streaming server with BackTrack

The Linux kernel, supporting both preemptive multitasking and virtual memory, provides every process both a virtualized processor and a virtualized view of memory. This is true even if the device is a modem being used by the PPP daemon to connect a Linux system onto a network. Therefore Linux adds …

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Generating use cases for C++

No distribution of Linux is completely bug-free, so you may be required to fix small problems by hand after installation. Keep in mind that these are only conventions---not rules. There are Web sites, articles, and books devoted to the subject, and Linux User Groups (also known as LUGs) meet in …

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Has head gone past its sell by date?

Therefore, when moving to the PDP-11 as the main hardware platform, the developers started C as the as a core language for Unix. Advocates of copyleft respond by pointing out that there is no such thing as absolute freedom. The test and set operation is, so far as each process …

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Can you install BioKnoppix on the Rasberry Pi?

In commercial UNIX development houses, the entire system is developed with a rigorous policy of quality assurance, source and revision control systems, documentation, and bug reporting and resolution. This was the beginning of techniques such as license keys. This is true even if the device is a modem being used …

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Create your own video streaming server with BioKnoppix

As a result, software developers choose a programming language to create source code based on ease of use, functionality, and comfort level. The currently pending signals are kept in the signal field with a mask of blocked signals held in blocked. The POSIX standard was born in 1988, as well …

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How to evaluate error messages with route

But it starts at the top. For Linux, a vendor can create a device driver for a specific hardware device and expect that, within reason, it will operate across most distributions. When Corporations are happy with the used software they donate money to the communities in order to be able …

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Succeed with dirname on Linux

To do this the IDE subsystem uses the minor device number from the device special identifier, this contains information that allows it to direct the request to the correct partition of the correct disk. Both of these flags are used for demand loaded modules. Unix and Linux are similar in …

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How to automate tasks on a Linux system

Its purpose is to provide a financial incentive for producing such works in order to benefit society as a whole. It also has a utility to let you select real-time kernels. The systemd-boot bootloader generates a menu of boot image options, and can load any EFI boot image. When a …

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Turn on assembly listings

From the filename, the kernel obtains the inode number. The command cd may be run without a location as we saw in the shortcut above but usually will be run with a single command line argument which is the location we would like to change into. A block device cannot …

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Getting started with the Linux uudecode command

But Unix has a much richer history beyond those bearded C programmers from the 1970s. By the time I was done, I had actually forgotten how to use my old piece of proprietary garbageware. But all of this would likely not be possible without the real-time functionality of the Linux …

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Getting started with the Linux mtype command

All of the read/write heads are attached together, they all move across the surfaces of the platters together. Some users have reported success configuring and installing drivers for the various winmodems, including Lucent, Conexant, and Rockwell chipsets. Yet throughout many school systems, the software in use on computers is …

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Unwrapping dnssec-signkey

Authorization in Linux is provided by users and groups. This is also true for a number of major system tasks where the hardware and software must cooperate closely to achieve their aims. It was unbelievably naive of them to think they could stop the spread of an idea. Later on …

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Is the Linux OS suited to Mobile devices?

Initially, there is only one directory on the disk, the root directory. But note that this book does not cover the Linux programming environment -for example, there is no tutorial on make in these pages. The count is the number of kernel entities that are dependent on this module. In …

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Focus on the outcome when using cdparanoia

It also helps to know how to access the Internet and be able to do basic web searches with a search engine such as Yahoo or Google. Of course, we knew that all along. This means that subsequent INET socket calls can easily retrieve the sock data structure. For example …

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How to install lspci on Ubuntu

Functions are defined by using the function keyword and followed by function body enclosed by curly brackets. The data is read by a head, which can detect whether a particular minute particle is magnetized. FLOSS OSes tend to include many applications that are usually sold separately in proprietary systems (including …

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Let your Amigo Linux terminal speak its mind

The exact mechanism varies from architecture to architecture. Those programs or issues that have not yet been addressed or resolved for Linux can still reside on the original drive and remain operational as long as they are needed. GNU/Linux increases personal computing freedom. Usually Linux based malware are extremely …

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Using more to view text files at the BeatrIX command line

There are several web sites that provide drivers and assistance for configuring WinModem based devices. Often, the users who identify the bugs can fix the problem because they have the source code, or they can provide detailed descriptions of their problems so that other developers can fix them. A good …

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Understanding the backup generator game

Named pipes (often called FIFOs, short for "first in, first out") are an interprocess communication (IPC) mechanism that provides a communication channel over a file descriptor, accessed via a special file. I say somewhat, because the use of sed in conjunction with pipes is somewhat more comfortable (at least to …

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Succeed with atrm on Linux

Whereas pwd is just run by itself with no arguments, ls is a little more powerful. If this execution fails because the file is not in executable format, and the file is not a directory, it is assumed to be a shell script, a file containing shell commands. They are …

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How to set up the Perl environment on Ubuntu

A keyboard is an example of a character device. Not only you earn more capabilities as a developer, you also learn (sometimes the hard way) how to solve issues, monitor your machine for potential problems, configure different components and more. However, free software itself is not. The takeover of software …

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Redirecting output with Feather

Internal commands are, as you might expect, built into the shell program. In contrast, the source code for closed source operating systems is not released to the public for scrutiny, which means customers must rely on the vendor of that closed source operating system to provide secu- rity. Frequent emails …

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Here's what no-one tells you about minfo

The UEFI boot manager boots the mini-bootloader, then, in turn, it boots the standard Linux bootloader image. The exact wording of a recipe as it is written by its author is protected under copyright law, but the information itself (i.e., the names of the ingredients, their quantities and the …

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My experience with Nova

By opening the code to widespread examination, more people take part in finding its bugs and security flaws, in testing for broad compatibility across platforms, and in providing new ideas. This means that when the next process that attempts to access this memory gets a page fault, the shared memory …

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How to install mknod on Suse

In this way, the Internet acts as the glue that binds together Linux developers in particular and OSS developers in general. Built in to the structure of the command-line environment are dozens of commands and several text-based help systems. Now, imagine that the execution of all the above commands is …

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Sick and tired of using paste the same way?

Why make it easier for them. However, in most cases it is closed source (i.e., the source code is kept secret), and there are often restrictions on the use of the executable version. If all of the semaphore operations would have succeeded and the current process does not need …

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What's the purpose of the GPG-KEY file?

To make sure that even in a dual boot scenario office staff do not cling to their past desktop but acclimate quickly to the new desktop simply requires a "conversion plan." All of the employees know they will have a dual boot system that is fully functional for the first …

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Answered - your most burning edquota questions

However, this is no less "programming" than anything else. On these foundationless grounds, what would be the problem with using Skype and locking not only yourself, but also all of your friends, into one company's software and protocol? It uses YUM for package management. A host wishing to know the …

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Docker and CRUX

Many developers believe this open-source model makes Linux inherently more secure than a proprietary operating system. You can find good software out there for processing your access file. Each type of device has its own special device file. A block is usually a power-of-two multiple of the sector size.

Old …

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What's your favourite X session manager

In a multiprocessing system many processes are kept in memory at the same time. The kernel does not impose any restrictions on concurrent file access. This software universe had been going on behind my back for years. Just maybe that crash you reported will save some people from a major …

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