Developing with Ruby on Rails in a Linux container

What we call the Linux operating system today is really the combination of two efforts from the early 1990s. I should like to point out you should NEVER be logged in as root all the time, as you may damage your system. Setting up TCP/IP connections is very different …

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Learn apropos to further your career

Originally, virtually all software was freely available to copy, use, study, modify, improve and give away. But, as we all know, there are typically many directories on a system. Until Linux came along it was either Windows or Macintosh - take it or leave it. The IP protocol layer itself uses …

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Data collection under Ubuntu

bash allows the current readline key bindings to be displayed or modified with the bind built-in command. Libraries were written and ported, filesystems developed, and hardware drivers written for many popular devices. Other common sections in ELF executables are the absolute section (which contains nonrelocatable symbols) and the undefined section …

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Emotional support animal

The term “emotional support animal” is in the news at present, mainly, sadly, because of its predictable abuse. In Japan, companion animals are petto or aigando butsu, animals to love, or play with, or take pleasure in, which just about covers it all. The next time you greet your own …

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The Mazambican poachers

To kill rhinos, Mozambican poachers appear to prefer hunting rifles over other firearms available to them. There is evidence that Czech CZ 550 bolt-action rifles have become more popular with poachers in recent years. While obtaining a rifle through official channels in Mozambique can take up to six months, there …

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Columbias corporate security

While Colombia is a special case in some ways because of its long history of conflict, extractive industry activities in less extreme settings are increasingly marked by the presence of private, corporate security. The result is a variety of collaborative partnerships between public and private, formal and informal types of …

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Is Ruby on Rails the best programming language for Linux?

Consequently, it can be said that this book is a book on Linux programming in general. Almost certainly, but it's doubtful that it would maintain the presence that Android currently enjoys in today's consumer market. However, Unix is not free. This is used by gateways, which respond to ARP requests …

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Getting C++ and Fuduntu to play nicely

For example, a process may have to wait for a character to be read from a file. Still, this survey does compare Windows 2000, GNU/Linux (up to 497 days usually), FreeBSD, and several other OSes, and FLOSS does quite well. The Base Image is an initial image which contains …

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A graphical client for the Soulseek P2P network

For instance, containers have largely evolved through community involvement. There are three types of partition supported by fdisk, primary, extended and logical. Any of the bytes within a file may be read from or written to. The answer is that you can use any method you like to refer to …

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My experience with Joli OS

Recently DBMS Superpower Sybase made their Adaptive Server Enterprise technology available on the Linux platform. The takeover of software by corporations continued at a rapid pace, and free software was becoming an endangered species. When a user logs in, the login program checks the username and password, and then starts …

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Interesting apps based on tac

This, in turn, allows for the use of the pathnames with which all Unix users are familiar-for example, /home/blackbeard/concorde.png. I think Linux is more a state of mind. When you boot a system that uses the GRUB Legacy bootloader, you'll see a menu that shows the boot …

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Creating a PACKAGES.TXT file for your distro

Open source licenses can grant you the right to copy and redistribute the software to everyone you want. These negative connotations include lack of quality, of robustness, of support and of long-term commitment. They come in multiple varieties, including the Unix domain socket, which is the form of socket used …

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No more mistakes with sudo

In addition, gcc and g++_ implement extensions to the C and C++ languages. From the process's perspective, the view of the system is as though it alone were in control. Each VFS inode has associated with it a set of file operations and these are different depending on the …

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Redirection of output

The most common disks used in Linux systems today are Integrated Disk Electronic or IDE disks. This is because IP addresses are simply an addressing concept, the ethernet devices themselves have their own physical addresses. The LSB extends POSIX and SUS, and adds several standards of its own; it attempts …

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Using screen on Kali Linux

A process that has terminated, but has not yet been waited upon, is called a zombie. The data bus holds the data transfered. The instructions have to be fetched from memory as they are executed. There is no single organization responsible for developing the system.

Is ntpd better on FreeBSD …

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Running sendmail inside a docker image

When the request is made, it is up to the IDE subsystem to work out which IDE disk the request is for. The ARPANET pioneered networking concepts such as packet switching and protocol layering where one protocol uses the services of another. They can be unlinked from the kernel and …

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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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Watch YouTube videos at the PocketLinux terminal

This software universe had been going on behind my back for years. These common interfaces mean that the kernel can treat often very different devices and their device drivers absolutely the same. As a system programmer, you usually do not need any knowledge of how the kernel handles system call …

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Configuring swapper in easy steps

Still, manual partitioning is a valuable skill and a necessary one for the true Linux guru. It is time for the opening of the tools that will be needed to build this new age. Windows CE scales down to smaller platforms, but Windows simply does not scale up to the …

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Interesting apps based on ranlib

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. A regular file contains bytes of data, organized into a linear array called a byte stream. As …

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Getting acquainted with Mandriva Linux

So, /dev/hda2, the second partition of the primary IDE disk has a major number of 3 and a minor number of 2. A CIO does not want to be guessing whether or not a given ISV application will work on their Linux distribution of choice; he or she NEEDS …

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Is Gnome the best windows manager for Linux?

For some small business leaders I've consulted, the human factor is either a notion to be rejected or ignored. Consequently, nowadays gcc is used as the generic name for the family of GNU compilers. First is the Human Factor, which includes the psychological issues with change, any kind of change …

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Here's what no-one tells you about test

None other than the system call handler! The shell program is what presents the prompt and accepts subsequent commands. If you want to use Linux as a platform for a very advanced application or application set, you will be interested in aspects of the system such as kernel hacking, the …

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System administration commands and daemons

With each passing day, Linux gains more users and becomes much more user friendly. An operating system needs to be able to schedule an activity sometime in the future. A process that has terminated, but has not yet been waited upon, is called a zombie. When entering the text of …

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No more mistakes with touch

The thorough and col- laborative open source approach to testing software and fixing software bugs increases the stability of Linux; it is not uncommon to find a Linux system that has been running contin- uously for months or even years without being turned off.Security, a vital concern for most …

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Instance names should not be specified when using at

Indeed, in the case of Linux-based cash registers, it would in all likelihood be a security risk to release the code to a wide audience. he Linux terminal is superior to use over Window's command line for developers. The API user (generally, the higher-level software) has zero input into the …

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How logname can help power your webapp

Slackware includes LILO and Loadlin for booting Slackware Linux. Instead, Linux aims toward compliance with two of the most important and prevalent standards: POSIX and the Single UNIX Specification (SUS). It is as old as computers themselves. When the systems running our voting is proprietary or closed, it means that …

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My emacs and imapd workflow

There are three types of partition supported by fdisk, primary, extended and logical. The device driver maps the bytes over a seekable device, and user space is free to access any valid bytes in the array, in any order-it might read byte 12, then byte 7, and then byte 12 …

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Getting C++ and Fuduntu to play nicely

The master disk on the primary controller is /dev/hda and the slave disk is /dev/hdb. It is being widely used in embedded devices such as mobile phones and PDAs (Personal Data Assistants). All the linux commands like grep, cat and ls can be pipelined easily. It sure isn't …

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No more mistakes with dd

A vi-style line editing interface is also available. So that modules can use the kernel resources that they need, they must be able to find them. The GNU C library provides more than its name suggests. The operations performed may cause the processor to stop what it is doing and …

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Interesting apps based on tailf

For new system timers, the entries in the linked list of timer_list data structures are checked. One of the main arguments used for Free Software is the advantage of not reinventing the wheel, yet in the case of nearly every hole in the software platform to fill, there are at …

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Is Pantheon the best windows manager for Linux?

In either case, the kernel simply resolves the pathname to the correct inode. Users are expected to shell out cash and more cash for each "feature" Microsoft decided to throw their way. Compare this to a floppy disk which only spins at 360 RPM. It is a synthasisable core and …

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Get rid of declare once and for all

The default action for the SIGFPE signal will core dump the process and then cause it to exit. Any of the bytes within a file may be read from or written to. Through virtual memory and paging, the kernel allows many processes to coexist on the system, each operating in …

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Troubleshooting hardware problems in Gnoppix

Automation is also a game-changer using the terminal. Open source has become the de facto way to build software - not only in tech, but across diverse industries. In 1991, this final gap was filled by Linux, a kernel which was written independently of the GNU project by Linus Torvalds, then …

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Getting started with the Linux modinfo command

What interesting system calls are provided in Linux compared to other Unix variants? Yet, it was relatively little used for computer software prior to the development of UNIX, and even today its great benefits fail to be fully exploited by other operating systems, most notably the Microsoft Windows systems. A …

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Scripts vs Compiled Programs

When writing programs to automate – well, everything – always use shell scripts. Because shell scripts are stored in ASCII text format, they can be easily viewed and modified by humans just as easily as they can by computers. You can examine a shell program and see exactly what it does and …

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Using the Linux Command Line

Working with the Linux operating system requires you to have knowledge about the terminal and the command line. It is essential to know what these things are, to be at least slightly familiar with their usage and the standard commands available. What is a Terminal? A terminal is described as …

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How to set up the C environment on Ubuntu

From the inode number, the inode is found. To be safe, always put alias definitions on a separate line, and do not use alias in compound commands.and comments, except that the function name must be the first thing on the line. These extensions are collectively called GNU C, and …

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Installing a web server under Network Security Toolkit

This bleeding edge distro's repository is always up-to-date. Each class of device driver, character, block and network, provides common interfaces that the kernel uses when requesting services from them. Extended partitions are not real partitions at all, they contain any number of logical parititions. (There are a few instance where …

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