HP has just released its first beta version of the webOS, It is said the user experience of webOS is quite impressive, so I immediately had it installed on my PC. There are two versions of Beta release,one embedded version and one Ubuntu version. I briefly share my installation experience of webOS in Linux.In the official document, it says "By 'Linux' we mean 'Ubuntu Linux'", it doesn't support server version and 64 bit version of Ubuntu. Here I use Mint 13.1. Clone source code from githubAddress : https://github.com/openwebos/build-desktopgit command :1git clone https://github.com/openwebos/b...

Below is the collection of Linux command line tips which I’ve found useful for Linux users. To get more information about the command mentioned below just open your terminal and type man <command>.Things a Linux user must learnLearn bash: No need to refer a lengthy bash guide or something else. Just read the complete man page of bash (man bash).Learn vim: You might be using Emacs or Eclipse for your work all the time but nothing can compete vim.Learn ssh: Learn the basics of passwordless authentication.Learn basics of bash job management: Using &, Ctrl-C, fg, bg, Ctrl-Z, jobs,...

A- The GUI way (for beginners only)For those who are new to linux and don't want to use a FTP server without GUI, or just for those who don't use often their FTP server and wish to set it quickly without a high level of security, there is a GTK GUI for proftpd.Be careful, it's less secure than configuring yourself your server.1- Install proftpd and gproftpd with synaptic or with this command :Code:sudo apt-get install proftpd gproftpd2-Play with the GUI and set up quickly your server.Beware no support is offered here for this tool but it shouldn't be too hard to use.B- The secure way1-&nb...

Many people hack together shell scripts quickly to do simple tasks, but these soon take on a life of their own. Unfortunately shell scripts are full of subtle effects which result in scripts failing in unusual ways. It's possible to write scripts which minimise these problems. In this article, I explain several techniques for writing robust bash scripts. Use set -u How often have you written a script that broke because a variable wasn't set? I know I have, many ti...

A few that come to mind, some less known, some more:xargs or parallel: run things in parallel, with lots of optionssed and awk: more well-known but still super useful for processing text files, and faster than Python or Rubym4: simple macro processorscreen: powerful terminal multiplexing and session persistenceyes: print a string a lotcal: nice calendarenv: run a command (useful in scripts)look: find English words (or lines in a file) beginning with a stringcut and paste and join: data manipulationfmt: format text paragraphspr: format text into pages/columnsfold: wrap lines of textcolumn: form...

SSH is a popular cryptographic network protocol for secure network service operation. It is frequently used in remote server login. For a system administrator or software developer, SSH is frequently used to access remote servers or development servers or testing servers etc. To login with SSH, there are different authentication mechanisms : password, public key and interactive etc. If a remote server needs to be accessed frequently, password authentication may be too troublesome as password needs to be typed every time. In this scenario, public key authentication would be a life sav...

ext3 is a journaled file system that is commonly used by the Linux kernel. It is the default file system for many popular Linux distributions, including Debian. Stephen Tweedie. On June 28, 2006, Theodore Ts'o, the principal developer of ext3, announced an enhanced version, called ext4. Today, we will show how to convert ext3 to ext4 format on CentOS.System environment:Release version : CentOS release 5.4(Final)Kernel:  Linux localhost.localdomain 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 x86_64 x86_64 GNU/LinuxAssume the pa...

Greg Kroah-Hartman has released long-term kernel 3.0.20 and stable kernel 3.2.5. Both contain just a single bug fix that allows PCIe power-saving technology ASPM (Active State Power Management) to be used on systems with a BIOS that activates ASPM on some components, but states in the FADT (Fixed ACPI Description Table) consulted by Linux that ASPM is not supported. According to Matthew Garrett, who developed the patch, the change can reduce the power consumption of a Thinkpad X220 by 5 watts. The H's associates at c't magazine in Germany tested systems in their laboratory and experienced...