Using more to view text files at the Morphix command line

These categories determine what powers are available to a user. We can compare and contrast system programming with application programming, which differ in some important aspects but are quite similar in others. But wait, this is a filesystem article, right? They arise from differences in their histories, in the philosophies …

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Using the rev tool on Kali

While openSUSE Leap is the LTS release which remains pretty up to date and guaranteed stability, Tumbleweed is the rolling release for those who love the taste of the latest software. Thus, the computer will request replacement of the disks during the course of the installation process. Named pipes act …

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A lazy person's guide to which

Technologies that matter to our freedom are used in our voting systems, our leisure, our work, education, art and our communication. If you are used to developing for Windows or Mac OS, the biggest shock when developing for Linux is probably the wide variety of Linux environments. Users are expected …

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Does fsck sometimes make you feel stupid?

You are not forced into any path you do not choose to follow. Only specifically entered symbols are added into the table, which is built when the kernel is compiled and linked, not every symbol in the kernel is exported to its modules. Select it, and type xterm or konsole …

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Using the tailf tool on Kali

As a result, software developers choose a programming language to create source code based on ease of use, functionality, and comfort level. Everything a good programmer can wish for is available: compilers, libraries, development and debugging tools. How do I write optimal code, and what tricks does Linux provide? This …

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Developing with sane-find-scanner

The philosophy allows easy debugging, high flexibility and predictable results. The core of Linux is regularly worked on by efficiency-obsessed engineers who run thousands of expensive servers, and most of the desktop versions meant for personal use run lighter than their Windows and Mac counterparts. Since computers are so deeply …

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Is the Linux OS suited to Home theater PC devices?

Once ready, make your new file executable using chmod command with an option +x. Modules that have other modules dependent on them must maintain a list of references at the end of their symbol table and pointed at by their module data structure. It has subdirectories, they have subdirectories and …

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How setterm can spruce up your system

While there are other options, the most common scripting language is Bash. Programmers write Linux source code in many different programming languages. In user space, Linux implements threads in accordance with POSIX 1003.1c (known as Pthreads). In the preceding example, the kernel starts at /, gets the inode for home …

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A simple guide to bzgrep

The access file logs every visit to your web site. Recently, Linux has replaced this security system with a more general capabilities system. If the search is successful, or if the command name contains one or more slashes, the shell executes the named program. A server using sockets, first creates …

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Adventures with poweroff and Arch

Instead of a simple binary check, capabilities allow the kernel to base access on much more fine-grained settings. Extended partitions are not real partitions at all, they contain any number of logical parititions. You can think of the function as a way to the group number of different commands into …

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Quick and easy fixes using debugfs

Origin of Concept of Free Software The term free software is relatively new. Some distros have them pre-installed, some make them available through their package repositories. This led to the development of the free software movement by Richard Stallman. At this point the kernel is executing on behalf of the …

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The best Video player for the command line

he Linux terminal is superior to use over Window's command line for developers. You may have heard of Unix, which is an operating system developed in the 1970s at Bell Labs by Ken Thompson, Dennis Ritchie, and others. Linux has an excellent ecosystem with mature APIs as well as an …

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The ultimate guide to deallocvt

Many developers believe this open-source model makes Linux inherently more secure than a proprietary operating system. Likewise, the smallest logically addressable unit on a filesystem is the block. Even in the days before the Internet, information and so-called "intellectual property" could still be, and were, exchanged. Public domain refers to …

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Job control under Slackware

It contains a compressed kernel image which is used to control the hardware during installation. Its own Software Center has tons of free applications that make it a great Linux OS for programming. Partitioning a disk allows the disk to be used by several operating system or for several purposes …

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How much do you know about the Linux objcopy command?

From the kernel, of which a substantial part of it is written in C, to lots of everyday user-land applications, C is used massively on your Linux system. Voting, commerce, medical records, tax calculation and collection, entertainment, all are affected by computers. All bytes in a section are treated the …

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Running sshd inside a docker image

In many cases, the software's creator may have made a Linux version of the same program you use on other systems. It's Linux, not a proprietary operating system, that provides this vast scalability while also offering the underlying capabilities to abstract the various computing layers to make managing such a …

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At the command line with numactl

Every process except the first has a parent. Every transmitted ethernet frame can be seen by all connected hosts and so every ethernet device has a unique address. There is also the reverse function, Reverse ARP or RARP, which translates phsyical network addresses into IP addresses. This pragmatic approach forces …

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Get the most out of Freesco

Very little Free Software would be written, and that which was written may not be released to the public. (See "Shell Built-in Commands.") Readline has variables that can be used to further customize its behavior. Sections are linear chunks of the object code that load into linear chunks of memory …

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Getting your CD burners up and running on Linux

What most of us call "files" are what Linux labels regular files. It stands to affect the people of the world at least as profoundly as the Industrial Age. From the process's perspective, the view of the system is as though it alone were in control. This operation is called …

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Redirecting output with G2Linx

Almost certainly, but it's doubtful that it would maintain the presence that Android currently enjoys in today's consumer market. For the old system timers the timer_active bit mask is check for bits that are set. There are more than enough Linux haters out there to spotlight their dislikes in Linux …

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How to evaluate error messages with less

Users of closed source operating systems must report the bug to the manufacturer and wait for the manufacturer to develop, test, and release a solution to the problem, known as a hot fix. Thus, there is no term free mathematics. Outsource open source software development to O2I and benefit from …

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Running sendmail inside a docker image

Some cross-site-scripting attacks are possible when the attacker finds a weak spot in your source code and they can even leave the malicious code dormant for a long time before executing it. Also pulling more from a cultural level than a technical one are the concepts of crowdsourcing and crowdfunding …

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Learn mesg to further your career

You can also edit boot options on the fly from the GRUB menu. The operating system then uses the computer hardware to perform the tasks required by the applications. These are independently developed pieces of software that work with the kernel in order to function as a complete operating system …

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Getting started with inetd on Arch Linux

Without Linux, IoT would likely simply be too financially draining or require lock-in to a single vendor's stack. Fortunately for us there is an easy to use resource that can inform us about all the great things we can do on the command line. Some such devices are partionable, which …

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Shortcuts for ip made easy

Hedging our bets is what this issue of Troubleshooting Professional Magazine is all about. In this case the semaphore clean up code simply discards the sem_undo data structure. Commands run as a result of command substitu- tion ignore the keyboard-generated job control signals SIGTTIN, SIGTTOU, and SIGTSTP. All system times …

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Tips and tricks for using CUPS for printing with Knoppix

We who are enthusiastic about GNU/Linux want to spread that freedom around. However, this is no less "programming" than anything else. Recently, Linux has replaced this security system with a more general capabilities system. Because it is free software, licensed under the GNU General Public License, Linux obviates the …

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No more mistakes with pushd

When I have unmounted the VFAT partition the system detects that I no longer need the VFAT file system module and removes it from the system. If you can use a computer or other electronic device, you can use Linux. The fact that open source code offers complete transparency acts …

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Open the gates for strip

The API merely defines the interface; the piece of software that actually provides the API is known as the implementation of the API. Most recently, the U.S. Before I became involved in Free Software, I had far different opinions, ideas, and beliefs than I do today. This highly stable …

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Getting up and running with Gnome Flashback

Its purpose is to provide a financial incentive for producing such works in order to benefit society as a whole. How does the kernel know which directory to look in to find a given filename? Any microprocessor that wishes to support an operating system must have a programmable interval timer …

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Booting ClusterKnoppix faster

You can code one version of your software and give it away freely, yet still maintain a commercial version with enhanced features. This tutorial is organised as such, with each section building upon the knowledge and skills learned in the previous sections. Dynamically loading code as it is needed is …

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A technical overview of mtr

Software running on the CPU must be able to read and write those controlling registers. Each process is in turn associated with exactly one uid, which identifies the user running the process, and is called the process's real uid. For many people, the next step will be to carefully read …

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Compiling your own kernel on Asianux

Share your personal experiences (good and bad) with Linux. They represent a totally different way of producing software that opens up every aspect of development, debugging, testing, and study to anyone with enough interest in doing so. Purchasing your own digital signature key can be expensive, and somewhat cumbersome if …

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Getting the best out of env when using Ubuntu

The mini-bootloader acts as a middleman in the boot process. If you hit Tab again it will show you those possibilities. Even if you are an aged UNIX guru, what follows is probably of interest to you. If a match is found, that builtin is invoked.

A lazy person's guide …

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Minimize speed when using your first file modifier

When I have unmounted the VFAT partition the system detects that I no longer need the VFAT file system module and removes it from the system. If no output_file is supplied, output goes to stdout. The INET socket layer supports the internet address family which contains the TCP/IP protocols …

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Getting the best out of install when using Ubuntu

The installation and setup process of this Linux distro for programmers is almost just like Fedora. For some small business leaders I've consulted, the human factor is either a notion to be rejected or ignored. Perhaps it will become easier to provide a better answer to the debate among free …

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Focus on the outcome when using ram

Every program that is running is called a process. A process's resources, along with data and statistics related to the process, are stored inside the kernel in the process's process descriptor. I use Linux for everything. Accepting Linux need not mean using it or even liking it.

Running swapper inside …

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Understanding the fundamentals of xfsdump

Its one-time installation is sufficient and every time a new version is released (very early every month), you get an updated machine. Background processes are those whose process group ID differs from the terminal's; such processes are immune to keyboard-generated signals. There will always be at least two kinds of …

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