Linux Community Magazine

In recent years, the mobile and internet technologies have shown prominent growth across the globe. And therefore, in order to fulfill variety of needs at both individual and enterprise level the demand of mobile applications is increasing day by day. At present, mobile application development has become one of the most prominent services that are being offered by mobile apps development companies. Since its inception, Android has shown tremendous growth and has been considered one of the most prominent technology platforms available for mobile apps development. In general terms, Android is an open source operating system that is based upon Linux and has been developed by Google and Open Handset Alliance (a pool of 84 software, hardware and telecommunication companies). The Android is based upon Linux Kernel, middleware, libraries and APIs that are written in C programming language. And, the application software runs on application framework that includes Java compatible l ibraries that are based upon Apache Harmony. Generally applications are developed with Java language using Android SDK (Software Development Kit) Developers write code in a customized version of Java and can develop third party applications that can be run on Android based mobile phone / smart-phone or devises. Apart from this, other mobile apps development tools are also available including Native Development Kit or some extensions in C or C++. Android provides variety of features and benefits for Android application development. It has been considered one of the most flexible development platforms used for mobile apps development. Since, it is an open source mobile platform that is based upon Linux therefore; it provides wide scope of customization of mobile apps according to requirement. It consists of large collection of inbuilt libraries including 2D graphics library, 3D graphics library, VGA and supports all major audio, video and still media formats in order to develo p handset layouts and rich applications. It provides various tools that are inbuilt and help in running, debugging and testing various types of applications. It supports all major internet and data connectivity platforms including Bluetooth, GSM, EDGE, IDEN, Wi-Fi etc. A lightweight database named, SQLite is used for data storage and restoration. Because it provides a flexible and multitasking environment for development therefore, developers can have more control over application's appearance. Further to this, it doesn't differentiate the third-party applications and phone's core applications and therefore it provides wider scope of development. The Android operating system could be used on various devices such as mobile phones, smart-phones, net-books, tablet computers etc. In order to have wider reach to its users, there is an online store is available named Android Market developed by Google through which, one can browse and download various applications published by man y third-party developers. With help of Android mobile apps development, applications could be developed for many verticals of different needs ranging from business, entertainment and gaming , finance, marketing and advertising, social networking, healthcare, utility, travel and lifestyle, multimedia, CRM etc. targeting all major industries.

The increasing penetration of multi-featured smart-phones and different types of individual and business requirements are few factors that can be considered as a driving force for Android based application development. In coming days, certainly the offshore Android apps development is going to see much higher growth with more advancement in features and technology.

When you start your Linux computer, you might encounter the following error message during the boot process:"No root file system defined. Please correct this from the partitioning menu"Though it suggests you to correct this from partition menu, but you do not find any option on this screen. After this error message, the bootup process gets halted and you need to reboot your system. Every time you go for a cold reboot, you experience the same behavior. The final result of this behavior would be the inaccessibility of data and thus data loss. It will put you in need of Linux Data Recovery. Grounds of this issueThis error message may occur if the root file system of your Linux hard drive is corrupted. The problem may also occur if the root partition is corrupted or has got deleted.In Linux, the root partition is the hard drive volume that has Linux operating system installed and the file system that is used to manage root partition's data is known as root file system. The roo t partition or file system may get corrupted due to several reasons, which include the following:Virus infectionImproper system shutdownPower failureSoftware malfunctionYou need to resolve this issue at the earliest to reclaim your lost data. To do so, need to perform Linux Data Recovery. It is the job of specially designed applications, known as Linux Recovery Software. These software systematically scan your hard drive and extract missing, lost or inaccessible data from it. They are designed to have largely automated recovery routine, self descriptive user-friendly screens, to-the-point documentation and easy update features. Such software often come with free and precise support options as Technical Support to know the detailed software working and answer simple how-to questions. The modern Linux Recovery software take care of recovery from various Linux distributions an file systems. They come equipped as a Three Step Solution, which are: select the recovery option, sel ect the affected Linux volume and Start recovery. Stellar Phoenix Linux Data Recovery is an efficient Linux Recovery tool that. The software supports Linux Data Recovery from Ext2, Ext3 and ReiserFS file systems based Linux volumes. This Linux Recovery tool can recover data from most of the Linux distributions as Red Hat (Fedora, RHEL), Mandriva, Xandros, Ubuntu and more. To know more about the product, download and install its free demo version.

Modern computers allow you to install two or more operating systems on a single hard disk. This configuration is known as 'Multi-Boot'. Every operating system, such as Linux, employs one or more hard drive partitions. The way in which hard drive partitions and data is arranged, is known as hard drive geometry. If any kind of disagreement occurs with these hard drive partitions, you may encounter catastrophic consequences that will eventually lead to severe Linux data loss. In order to retrieve lost data in such circumstances, you need to perform Data Recovery Linux using powerful tools.

The MBR (Master Boot Record) includes a partition table, which describes where the primary hard drive partitions are stored. Partition table can contain at most 4 table entries, for the 4 primary partitions. The information in partition table is redundant: location of Linux partition is given by both 24-bit begin and end entries, and by 32-bit start and length entries. Linux operating system uses only the length and start fields, and thus can handle the partitions of not more than 232 sectors. It means, the length of Linux partitions can be at most 2 TB, which is 12 times bigger than modern hard drives.

Under some circumstances, you may come across various hard drive geometry errors, while accessing data from your Linux hard drive. One such error is as given below:

"Disk geometry error"

You encounter such error messages when the Linux operating system tries to read data at linear block address outside the end of BIOS (Basic Input/Output System) translated area. This problem generally occurs if the size of Linux hard drive is larger than the size that can be handled by BIOS.

The problems may also occur due to overlapping of the Linux partitions. In such circumstances, all your hard drive volumes become completely inaccessible. In order to sort out this problem, you need to restore data from the most recent backup.

However, if you do not have an absolute backup, you encounter data loss problems. In such situations, Linux Data Recovery becomes need of the hour.

Recovery is best possible with the help of powerful and advanced application, known as Data Recovery Linux software. They employ high-end scanning techniques to thoroughly scan the entire hard drive and extract all lost, missing, and inaccessible data from it. Linux Data Recovery utilities are totally safe and easy to use.

Stellar Phoenix Linux Data Recovery software successfully recovers lost, missing, deleted, or inaccessible data from Linux hard drive. It is designed to recover data from Ext4, Ext3, Ext2, FAT12, FAT16, and FAT32 file system volumes. This Linux Recovery software works well with all major Linux distributions, such as Red Hat, SUSE, Debian, Mandriva, and more.

Is your Linux hard drive crashing abruptly every time when you boot your system? Are you unable to boot your Linux computer and access data from it? Well, the problem may occur due to numerous reasons, which cause hard drive crash. Most commonly, this problem occurs due missing or corrupt data structures of your Linux hard drive. Due to the same, operating system can not locate stored files on the hard drive and access them. At this point, you need to opt for Linux data recovery solutions to get your valuable data recovered.

Crash of a Linux hard drive is indicated by various symptoms. Such symptoms include the following ones:

Your Linux operating system-based computer does not boot up.

You encounter various error messages, such as "No Fixed Disk Present" or "DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER"

Black or blank screen after you power up your system.

System reboots, freezes, or stops responding frequently.

"Operating system not found" and "Drive not formatted" messages.

Hard drive crash can be caused by various reasons and renders entire system inaccessible. The most common reasons of Linux hard drive crash are as given below:

Boot sector virus or damaged MBR (Master Boot Record).

Corrupted or damaged file system of Linux hard drive.

Missing or damaged system files or operating system.

Virus infection.

Corrupt Superblock or other critical meta data structures.

When system crash occurs, it becomes impossible for the operating system to locate files on hard drive. If it can not locate and access the files, which are required by Linux operating system to boot up, the boot process fails.

In order to fix a crashed Linux hard drive and perform Data Recovery Linux, you are required to format it and reinstall operating system. This process replaces all the missing, corrupt, or damaged system resources and bring the hard drive back to life. However, it also removes all the data from hard drive and create needs of Linux recovery.

Recovery is best possible using advanced and efficient commercial software, known as Linux recovery software. They use high-end scanning techniques to carry out in-depth scan of entire Linux hard drive to extract all lost data from it.

Stellar Phoenix Linux Data Recovery is an easy to use and read-only utility that recovers your valuable data in all data loss situations. The software works well with all major distributions of Linux operating system, including SUSE, Red Hat, Debian, and Ubuntu. It recovers lost data from Ext4, Ext3, Ext2, FAT32, FAT16, and FAT12 file system partitions.

Hard drive is the main storage device in any Linux computer. It stores all your significant data, applications, and Linux operating system. You can divide this non-volatile mass storage media into various volumes, for effective management of your significant data. Hard drive stores all the data on moving magnetic platters, which provides extremely fast data accessing.

It is considered as a reliable storage media, however you should create regular backup of your significant data to ensure absolute data safety. Backup is the identical copy of your precious data that helps you to prevent data loss and need of Linux hard drive recovery solutions.

Under some circumstances, your may not access your valuable data from Linux hard drive, can not boot up your system, and come across other similar situations. It can be caused due to logical damage to Linux hard drive. The most common reasons of hard drive failure and data loss from Linux hard drive are as given below:

File system corruption- File system is a significant component of your Linux hard drive. It is used by Linux operating system to organize files/directories on hard drive. It file system is damaged, Linux can not locate the files/directories stored on disk and thus you come across data loss situations.

Virus Infection- Viruses are malicious programs, which may damage data and data structures on your Linux hard drive. They make your system unbootable, inaccessible, and unusable.

Running fsck on a mounted volume- Linux operating systems includes an inbuilt utility, fsck, to check the integrity of file system and fix minor corruption. In case you run this command-line tool on a mounted Linux volume, severe corruption and data loss may occur.

Improper system shutdown- If your system shuts down unexpectedly because of power outage or system crash, current system processes are not stopped properly.

Hard drive formatting- If you accidentally format your Linux hard drive, all the data is removed from it. Formatting also deletes critical system metadata structures.

If you encounter any of the above problems, you need to restore data from most recent backup and perform hard drive recovery.

You can easily retrieve your mission-critical data using advanced and powerful Linux hard drive recovery software. The applications offer easy and safe Linux hard drive recovery with simple user interface and non-destructive behavior.

Stellar Phoenix Linux Data Recovery is the most advanced and efficient utility to offer assured recovery of your valuable data. The software recovers data from all Ext4, Ext3, Ext2, FAT32, FAT16, and FAT12 file system volumes. It works well with all major distributions of Linux operating system, such as Fedora, SUSE, Red Hat, Debian, and Mandriva.