6 Linux Alternatives to Help You Develop Apps Without Care

Even though you are a Linux neophyte, there is little doubt you must not have heard of Ubuntu. Launched back in 2004, Ubuntu started to make an easy to use Linux based operating system that was both hardware compliant, easy to use, and a real alternative to Windows. Although you might find plenty of linux-based distributions to build your mobile app, there is more to building apps then just depending on a linux-based operating system. In this blog, we’ve compiled a few best Linux alternatives which can ease your chances of building high-quality apps. Continue reading “6 Linux Alternatives to Help You Develop Apps Without Care”

How to Remove ^M in Linux & Unix

Control M ( ^M)  characters are introduced when you use  lines of text from a windows computer to  Linux or Unix machine.  Most common reasons are when you directly copy a file from a windows system or submit form data copied and pasted from a windows machine.

Detecting ^M characters

^M is non printable character and often becomes difficult to find, in order to see if your file contains any non printable character use the cat command with -v option

$cat -v filename

Methods to remove ^M

In all these method , real secret is not to type ^M using keyboard but rather typing in control key sequence to get the ^M control character. Continue reading “How to Remove ^M in Linux & Unix”

Linux Download : Top 10 Free Linux Distributions for Desktop and Servers

All the Linux distributions are either derivative of GNU/Linux ( OS made up of Linux Kernel developed by Linus Torvalds and GNU software repository) or derived from other Linux derivatives.

Desktop distributions comes with Graphical user interface enabled by default &   aimed at individual users and most of the administration work can be done using GUI. Good for new users and running Linux-based graphical applications.

Server Distribution are for more advanced users who are familiar with Linux command line as Graphical Interface is not enabled by default in most of the server distributions. Server distributions comes with web servers like apache  and networking packages like DNS and useful for running backend services , work as web server or DNS Server.

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fsck Command – Check & Repair Linux & Unix File Systems

fsck, similar to chkdsk in windows, checks and repairs the file system in Unix & Linux operating systems. Learn about fsck modes, phases & fsck errors messages

fsck, File System Consistency checK, is a system utility in Unix, Linux and other Unix like systems for checking and repairing file system inconsistencies.

File system can become inconsistent due to several reasons and the most common is abnormal shutdown due to hardware failure, power failure or switching off the system without proper shutdown. Due to these reasons the superblock in a file system is not updated and has mismatched information relating to system data blocks, free blocks and inodes.

fsck in Linux

fsck in this document is refered with reference to ufs file system but it can be used in Linux systems as

fsck -t ext2 /dev/sda3
or
fsck.ext2 /dev/sda3
fsck.ext4 /dev/sda3
fsck.ext3 /dev/sda3

it returns with any of the followig code

0 – No errors
1 – File system errors corrected
2 – System should be rebooted
4 – File system errors left uncorrected
8 – Operational error
16 – Usage or syntax error
32 – Fsck canceled by user request
128 – Shared library error

fsck checks the file systems defined in /etc/fstab in Linux and /etc/vfstab in Unix systems

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