Month: January 2018

What Do You Think About Linux Hosting Is Reliable

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Linux hosting has become increasingly in recent years. In all parts of the world, more than 60% of network servers now run Linux operating system and, from its humble beginnings at the Massachusetts Institute for Comprehensive Cooperation technology and lines of the Draft Programmed of the mid-1980s, has grown to Linux to become the world’s dominant solution free of charge.

Linux is open source software project cooperation. Under the terms and conditions of the Linux General Public License, all of the source code that makes this task the operating system can be modified freely by anyone at all.

Has allowed this “open source” approach to the development of software code writers from all over the world to contribute to the development and evolution of this operating system is unique. This situation contrasts sharply with organizations such as Microsoft, who still jealously guard the secrets of all systems, and their products. Many observers predicted the approach of open source software development would inevitably lead to programs that were horribly bloated full of mistakes and contradictions. In fact, turned to the contrary be true, it has been shown to be a Linux operating system is extremely stable and well designed.

Web hosting companies quickly realized that Linux can be provided free of charge to provide a number of clear advantages. Which operating system their own and inexpensive to replace. It is very easy to install and use and maintenance. It is a powerful, stable, safe and reliable. More importantly, when asked to set almost inevitable modifications and customizations, has ensured the open nature of the project for Linux that a very wide range of individuals with expertise and non-freely available.

Many advantages that offer Linux hosting organizations are also important for webmasters and web developers. Excellent reliability means that the hosting companies run Linux systems will usually be based on the excellent (in other words, very low), down time, numbers, and their host tend to be very resistant to virus attack. The latter is largely due to virus writers still tend to focus on the Windows operating systems, and of course this may change in future. However, for a moment, and host security is still a big advantage of Linux systems on the basis .

However, perhaps the most important weapon in the arsenal of Linux is the freedom of this system allows Web developers to exploit others, extremely popular and open source products, such as cell Python, XML lobby. It has grown each of these systems in popular software along with Linux. Made the control options and integration at the heart of Linux as the logical choice for each of the hosts and developers who want to take advantage of this powerful open source product.

Finally, almost all Linux systems now come with hosting Control Panel, Control Panel is very popular.

Resists The Network Attack With The Linux System Firewall Function

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The hypothesized main engine service provider will possibly come under the hacker attack in the operation process, the common forms of defensive action will have SYN, DDOS and so on. Through replaces IP, searches the stand which attacks is possibly avoided attacks, but interrupt servicing’s time comparison is long. Acquires the hardware firewall compared with the thorough solution. However, the hardware firewall price is quite expensive. May consider that provides the firewall function using the Linux system itself to defend.

1. Resists SYN
The SYN attack is the principle which 3 times shakes hand using the TCP/IP agreement, transmits the massive establishment connection the network package, but is not practical establishes the connection, causes to attack finally server’s network formation to fully occupy, is unable by the normal user visit.
The Linux essence has provided the certain SYN related disposition, with order:
sysctl – a | grep syn
Sees:
net.ipv4.tcp_max_syn_backlog = 1024
net.ipv4.tcp_syncookies = 0
net.ipv4.tcp_synack_retries = 5
net.ipv4.tcp_syn_retries = 5

tcp_max_syn_backlog is the SYN formation’s length, tcp_syncookies is a switch, whether to open SYN the Cookie function, this function may prevent the part SYN attack. tcp_synack_retries and tcp_syn_retries define SYN to try the number of times again.

Increases the SYN queue size to be possible to hold the more waiting connections the network connections number, opens SYN the Cookie function to be possible to prevent the part SYN attack, reduces tries the number of times also to have certain effect again.

Adjusts the above establishment the method is:
Increases the SYN queue size to 2048:
sysctl – w net.ipv4.tcp_max_syn_backlog=2048
Opens SYN the COOKIE function:
sysctl – w net.ipv4.tcp_syncookies=1
Reduces tries the number of times again:
sysctl – w net.ipv4.tcp_synack_retries=3
sysctl – w net.ipv4.tcp_syn_retries=3

Restarts for the system moves when maintains the above disposition, may join the above order to the /etc/rc.d/rc.local document.

2. Resists DDOS
DDOS, distributional refuses to visit the attack, is refers to the hacker to organize from different origin many main engines, to common port, like 80,25 and so on transmission massive connections, but these client sides only establish the connection, is not the normal visit. Because the general Apache disposition accepts the connection number limitedly (usually is 256), these the vacation the visit will fully occupy Apache, the normal visit will be unable to carry on.

Linux provided has called ipchains the firewall tool, might shield from specific IP or the IP address section to the specific port’s connection. Uses ipchains to resist DDOS, is first through the netstat order discovery attack origin address, then orders with ipchains to block the attack. Discovered that blocks one.

Linux Recovery How to Prevent Data Loss in Linux

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In computing, Partition is a part of hard drive that works as a different disk and has a separate file system. Disk partitioning is usually done for better management of stored data and to ensure safety of valuable data in case of operating system malfunction. However, there are some circumstances where you need to remove the Linux hard drive partitions/volumes. This behavior removes all the data stored on deleted partitions and lead to severe data loss. At this point, you are required to opt for Linux data recovery to extract your significant data.

Linux operating system supports a number of hard drive partitioning tools, such as parted (GNU General Public License partition editor), fdisk, sfdisk (command based version of fdisk), and cfdisk (curse based fdisk version). Sometimes, while performing basic maintenance of the boot partition or primary partition of Linux hard drive, you might encounter an error message similar to the following one:

“FATAL ERROR: Bad primary partition: Partition ends in the final partial cylinder”

The above error states the structure of partition is not intact and Linux operating system cannot read it. It may occur due to numerous reasons and put you in need of Linux recovery solutions.

Reason The above problem occurs if layout or structure of Linux volumes is not correct. The partitions are either overlapped or they are in wrong order. It may happen due to numerous reasons, ranging from virus infection to system crash.

Resolution In order to perform Data recovery Linux in such situations, you have to correct the disk layout. For this, it is essential to remove the existing hard drive volumes and then create new ones. Go through the below Linux file Recoverysteps to do so.

Use cfdisk -z /dev/device Linux command.

Use hard drive partitioning tools, such as gparted, if the above method does not work. Cfdisk may fail to format the disk if it cannot find the root of the above error.

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Linux Dashboard Solution With Opera Widgets And Compiz Fusion

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Many users who have migrated to using some form of Linux from Apples OS X, and even many who have not used OS X before find themselves looking for a Linux Dashboard solution. That is, many users look for a way to replicate the functionality of the OS X dashboard on a Linux operating system.

What is the Dashboard in the first place? It is an application designed for OS X systems that supports small applications known as widgets. These widgets are single purpose interactive virtual applications that are used, for example, to display the latest information, the time and date, the weather, online sites, and so on. They are small and simple, and allow for a great degree of customization since the user can select which widgets to use and which not to use. In a sense, they allow users to put together their own interface for performing their own kinds and mix of activities on the computer, both off and online. They are especially useful for power users and web developers who would need access to a wide variety of small apps over the course of their day.

This function as a widget engine is not unique to Dashboard, however. There exist several different engines that Linux users could also possibly use, if they just wanted to have widgets on their systems. What would probably be the more unique feature of Dashboard is the fact that these widgets are placed on a semi-transparent layer that is invisible until called up by the user. This layer can be activated by clicking on the appropriate icon, pressing a user-selected hotkey, or even moving the mouse to a specified corner of the screen. The widget layer would then be displayed with the actual desktop faded in the background. This means that the widgets are out of the way until the user needs them, providing an elegant solution to the clutter that inevitably became a problem with the use of widgets.

Fortunately, even this functionality can be had on a Linux system, and here is how. One way is to use Opera in conjunction with a Compiz Fusion plugin called Widget Layer. Opera Widgets are almost exactly the same as Dashboard widgets, offering a similar variety of small widgets for users to use with the Opera browser. These tiny web applications, however, run on the desktop by default, and are not hidden, like Dashboard widgets.

The Widget Layer plugin would allow you to specify rules for transferring regular windows from the windows manager over to a special widget layer. This widget layer acts exactly like the Dashboard widget layer in OS X, being invisible until needed and called up using a hotkey or mouse click. To make Opera Widgets run on this layer, simply set the Widget Windows field to role: opera-widget, and presto! This Linux Dashboard solution is just one among many, but is rather simple and easy, using only the Opera browser and the readily available Compiz Fusion plugins and configuration system.