Linux Command 101 Overview This article gives you a brief introduction to some of the major features of the bash shell, and covers the following topics: Interacting with shells and commands using the command lineUsing valid commands and command sequencesDefining, modifying, referencing, and exporting environment variablesAccessing command history and editing facilitiesInvoking commands in the path and outside the pathUsing man (manual) pages to find out about commands This article helps you prepare for Objective 103.1 in Topic 103 of the Junior Level Administration (LPIC-1) exam 101. Back to top The bash shell The bash shell is one of several shells available for Linux. Before we delve deeper into bash, recall that a shell is a program that accepts and executes commands. Shells have some builtin commands, such as cd, break, and exec. Shells also use three standard I/O streams: Input streams provide input to programs, usually from terminal keystrokes. Listing 1. [db2inst1@echidna db2inst1]$ ian@lyrebird:~> $
30 Useful (and Unknown) Web Apps You Need to Bookmark - Page 2 FillAnyPDF FillAnyPDF is a fairly simple web app which allows you to upload a PDF file, then easily write on it wherever you want. This allows you to easily fill out any form, even if they’re not in an editable PDF form. You can also share your blank form with others, so you can collect forms from a group easily. Google Wave “What is Google Wave?” That was the question a lot of people asked when Google launched its email-replacement-slash-collaboration platform Wave, and to a large extent, the question remains unanswered. SpeedTest Everyone wonders sometimes why their ISP’s claim of Blazing Fast Internet doesn’t seem to translate to faster downloads or lower pings. Grooveshark What makes Grooveshark special enough that we recommend it over the dozens of other music streaming web apps? Vuvox Vuvox is a rich media creation app that allows you to quickly turn your photos and audio into a moving web collage. Keep reading for more great web apps!
HTG Explains: The Linux Directory Structure Explained If you’re coming from Windows, the Linux file system structure can seem particularly alien. The C:\ drive and drive letters are gone, replaced by a / and cryptic-sounding directories, most of which have three letter names. The Filesystem Hierarchy Standard (FHS) defines the structure of file systems on Linux and other UNIX-like operating systems. However, Linux file systems also contain some directories that aren’t yet defined by the standard. / – The Root Directory Everything on your Linux system is located under the / directory, known as the root directory. /bin – Essential User Binaries The /bin directory contains the essential user binaries (programs) that must be present when the system is mounted in single-user mode. /boot – Static Boot Files The /boot directory contains the files needed to boot the system – for example, the GRUB boot loader’s files and your Linux kernels are stored here. /cdrom – Historical Mount Point for CD-ROMs /dev – Device Files /etc – Configuration Files
BACKTRACK LINUX Installing OpenVAS The simplest way of installing all of required parts of the openvas suite is to issue the following commands in a terminal window. root@bt:~#apt-get update root@bt:~#apt-get install openvas The package openvas is a "master" package that holds all of the info required to automatically download all of the other packages that make up the full openvas suite of tools. Once openvas has been installed you will find all the of menu entries in this location. Openvas check setup openvas-check-setup is a very useful tool, here it is showing how it can help diagnose problems and give advice on how to fix them. Setting up OpenVAS Step 1. From the menu, select Openvas Adduser and follow instructions. Note that you can use any username you like but in this case I have just used root. Step 2. From the menu, select Openvas mkcert and follow instructions. Step 3. At this point we need to get the latest set of nvt's. So select OpenVAS NVT Sync from the menu Step 4. Start Openvas scanner Step 5.
Mycenaean Greek Mycenaean Greek is the most ancient attested form of the Greek language, spoken on the Greek mainland, Crete and Cyprus in the 16th to 12th centuries BC, before the hypothesised Dorian invasion which was often cited as the terminus post quem for the coming of the Greek language to Greece. The language is preserved in inscriptions in Linear B, a script first attested on Crete before the 14th century BC. Most instances of these inscriptions are on clay tablets found in Knossos in central Crete, and in Pylos in the southwest of the Peloponnese. Other tablets have been found at Mycenae itself, Tiryns and Thebes and at Chania in Western Crete.[1] The language is named after Mycenae, one of the major centres of Mycenaean Greece. The tablets remained long undeciphered, and every conceivable language was suggested for them, until Michael Ventris deciphered the script in 1952 and by a preponderance of evidence proved the language to be an early form of Greek. Orthography[edit] Phonology[edit]
Migrate to a virtual Linux environment with Clonezilla How to convert a physical server to a virtual one using the open source tool Clonezilla Live Ting LiPublished on April 21, 2009 Thanks to two concepts driving the data center today—economy and green computing—server virtualization is a hot topic in the IT world and a lot of hardware and software vendors are offering solutions. Virtualization solutions can have several benefits: they can let you easily migrate a virtual machine from one server to another, and let you provision a virtual as a reproducible clone image for, say,software development and testing. The process for achieving virtualized server consolidation depends on your starting point: If you are designing your system from scratch, you will likely implement virtualization from the ground up.If your system already exists in the physical state, you will probably want to migrate from the physical environment to the virtual one. Introducing Clonezilla Live Virtualization and system migration tools Step 1. Clonezilla tips Figure 1.
GlassFish GlassFish is an open-source application server project started by Sun Microsystems for the Java EE platform and now sponsored by Oracle Corporation. The supported version is called Oracle GlassFish Server. GlassFish is free software, dual-licensed under two free software licences: the Common Development and Distribution License (CDDL) and the GNU General Public License (GPL) with the classpath exception. Overview[edit] GlassFish is the reference implementation of Java EE and as such supports Enterprise JavaBeans, JPA, JavaServer Faces, JMS, RMI, JavaServer Pages, servlets, etc. Built on a modular kernel powered by OSGi, GlassFish runs straight on top of the Apache Felix implementation. Releases[edit] Sun Microsystems launched the GlassFish project on 6 June 2005. On 8 May 2007 Project SailFin was announced at JavaOne as a sub-project under Project GlassFish. On 10 December 2009 GlassFish v3 was released. On 28 February 2011, Oracle Corporation released GlassFish v3.1. See also[edit]
Linux tips every geek should know What separates average Linux users from the super-geeks? Simple: years spent learning the kinds of hacks, tricks, tips and techniques that turn long jobs into a moment's work. If you want to get up to speed without having to put in all that leg-work, we've rounded up over 50 easy-to-learn Linux tips to help you work smarter and get the most from your computer. Enjoy! UPDATE: If these tips aren't enough and you want even more, make sure you check out More Linux tips every geek should know! #1: Check processes not run by you Difficulty: Expert Application: bash Imagine the scene - you get yourself ready for a quick round of Crack Attack against a colleague at the office, only to find the game drags to a halt just as you're about to beat your uppity subordinate - what could be happening to make your machine so slow? OK, let's list all the processes on the box not being run by you! ps aux | grep -v `whoami` Or, to be a little more clever, why not just list the top ten time-wasters: find . reset