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  • List of freely available system administrator books

    - by Sharjeel Sayed
    On the lines of http://stackoverflow.com/questions/194812/list-of-freely-available-programming-books, I'm trying to create a wiki of system administrator books with open source licenses, like Creative Commons, GPL, etc. Feel free to pour in your recommendations. Linux Linux Network Administrator's Guide, 2nd Edition Bash Advanced Bash-Scripting Guide MySQL MySQL Documentation Apache Apache Dektop Reference Networking TCP/IP Tutorial and Technical Overview

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  • Could we build a mega-processor out of superconductors?

    - by Carson Myers
    A superconductor, once cooled below a critical temperature, loses all of its electrical resistance and therefore becomes 100% efficient. This means that when a current flows through a superconductor, none of the energy is lost to heat or light. Theoretically, could we build a processor out of superconductive materials, that could effectively run at, oh I don't know, say, 300ghz? or 5,000ghz? Since a superconductive circuit is 100% efficient, this means that once supplied with electricity, the source of power could be completely removed from the circuit and the current would continue to flow forever. So if we made all the components inside a computer out of superconductive materials, could we get away with only supplying power to the peripherals and save a-whole-lot on energy, while dramatically increasing computing speed? Might this be one of the next big breakthroughs in computing? What do you think?

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  • Why have trackballs almost disappeared? [closed]

    - by Gary M. Mugford
    One of the movement sensors in my Microsoft Trackball Explorer has failed and right now I am using a mouse. Ugggh! I'll got steal one of the various Logitech trackballs spread around the house, but they all have issues. The Trackman has a horrible placement for the scroll wheel. Others have marbles for the thumb rather than a big ball for the fingers and at least one trackball is working around here without having a scroll wheel at all! (The one at the dinner table, for when I dine alone). My question is, why have trackballs fallen into disfavour? Seems to me that trackballs are great for crowded desktops (you know, the one with keyboards, notes, pens and coffee cups), and for laptops with those hated overly-sensitive touchpads. But right now, it seems to be a choice between that Logitech Trackman and some Kensington models that lack scroll wheels. All I want is a nice big ball to manipulate with the fingers and two buttons on the thumb side with the scroil wheel between them. Placement of other buttons is completely optional. Is that asking too much?

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  • Is it possible to use a dual processor computer as your desktop?

    - by Ivo
    I've seen some people suggesting to get a motherboard that supports two processors and stick two Xeon Nehalem processors in it. Could you use this system as a desktop PC or is this useless or even impossible? It's more hypothetical question if Windows 7 would support such a set-up. I know you could just take an i7, but wouldn't two of those processors be a whole lot more awesome? Like the previous generation Skulltrails? The idea would be to have a motherboard like this ASUS Z8NA-D6C Dual LGA 1366 Intel 5500 ATX and two Xeons (since I don't think i7's could be used) Intel Xeon E5405 Harpertown to run something like Windows 7 Ultimate.

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  • What PHP configuration and extensions are recommended for speed, efficiency and security?

    - by Sanoj
    I am setting up an Ubuntu server with nginx and PHP. I have read about many different configurations and extensions that could be added and it is pretty hard to know about all of them. I would like to hear from you, sysadmins, what PHP configuration and extensions do you recommend? I have read about: Suhosin for security Alternative PHP Cache for speed and efficiency Memcache for speed and efficiency PHP FastCGI Process Manager for speed and efficiency But I have no idea if they are good or not, and if I should use them together.

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  • Mac OS X: easiest (free, non-QuickTime Pro) application for converting numbered folder of images to

    - by Jared Updike
    I'd like to convert a folder of PNGs into a quicktime .mov with PNG compression (it's a folder of fractals in an animation; PNG compression works great here and the losslessness is important). What programs will do this with minimal fuss? (I don't have or want to pay for a full license of QuickTime Pro.) UPDATE: Let me make this more clear: minimal fuss means: I download some EncoderMagic.app (for example), I double click it to launch it. I select the folder with my numbered images, and out pops my movie. No mess. No resizing. ... Perhaps this doesn't exist (or is called QuickTime Pro?)

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  • Migrating data from SQL Server 2000 to SQL Server 2005

    - by Muhammad Kashif Nadeem
    I have to migrate existing data which is in SQL Server 2000 to SQL Server 2005. The schema of two databases is different. For Example Locations table in SS2000 is split into two tables and has different columns. This is one time activity. After successful migration I don't need old db anymore. What is the best way to transfer data from one SQL Server to another having different schemas? I can write stored procedures to fetch data from SQL Server 2000 and insert/update tables in SQL Server 2005. What about SSIS? I don't have any experience with this and is this better to create package of SSIS because I don't need this again and need to learn it first. Thanks.

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  • Windows Server 2008 R2 - What now?

    - by MrStatic
    So I installed Windows Server 2008 R2, I have Exchange 2010 running for some mail. I installed BlackBerry Enterprise Server Express for kicks. This server runs dns/dhcp for 2 laptops. But what now? It has 200g's free on the main drive and a 150g external that I have mapped as a network drive. I am not sure what else to do with this thing. It was my main station but since my laptop is nicer I am running it headless and using the lcd monitor for it as a second monitor for the laptop when I am at home.

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  • What's the entry path towards a database administrator job?

    - by FarmBoy
    I've recently lost my job, and I'm working towards changing vocations. My degrees are in Mathematics, but I'm interested in IT, particularly working as a DBA or a programmer. I don't have IT experience, but I have the resourses to be patient with the transition, and I'm currently learning SQL and Java. Obviously, I need some job experience. My question is this: What entry-level jobs might allow me to gain useful experience towards obtaining a DBA job? It seems to me that programmers often start as testers, and system administrators could start at a help-desk position, but it is unclear how one begins to work with a company's database.

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  • Critique My Backup and Storage Plan

    - by MetaHyperBolic
    My current storage (RAID-1 off of a hardware RAID card) and backup (a spare drive) solutions for my home network are inadequate. I have too much data scattered on various one-off drives. It is time to evolve. Backups seem simple enough, at least: lots of big drives. However, I am bewildered by the number of choices for small home storage. The Drobo S looks appealing. So does the ReadyNAS. I am not looking for bunches of shiny features, I'm mostly interested in reliability. I am not interested in building Yet Another PC to create a file server or doing something in the cloud, or whatever. I'm stupid, so I am keeping it simple. Requirements for Main Volume: Starting working space roughly 2TB, with options for growth up to 5TB RAID or something RAID-like with at least one parity drive eSATA II for speed during backups Ability to shut down gracefully when alerted of low power by a UPS Optional but Desirable: Will take 2TB drives now with options for the larger 3TB drives coming in 2010-2011 Optional but Desirable: : RAID-6 or something similar, with two parity drives Optional but Desirable: : Hot spare Ethernet connection not required, as the volume will be shared via the same machines which runs my home print server Backups: Backup performed via ROBOCOPY in mirror mode to an external hard drive via a eSATA II connection. Start with rotating between two external 2TB hard drives, will go up to six external 2TB drives. Start with a weekly backup, move to a bi-weekly backup as more drives are added. Move to 3TB drives as the size of my main volume increases. Backup drives will be stored on an off-site location. Hard drives: I plan on buying all of the same model, but different batches from different vendors. I found a "burn-in" utility with which I can pound away on the drives for a couple of weeks before adding them to the backup pool or the main volume. I estimate that I am looking at roughly $1,500 to start, once I start throwing in two TB drives for backup and four for storage. So, are there any obvious flaws in my plan? What have I overlooked? Any suggestions for the storage device for my main volume that fits my requirements? Or do I just keep it simple, 2 drives in RAID-1, then perform due diligence with my backups, accepting that I will have to buy a whole new unit when my data grows past 2TB?

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  • What PHP configuration and extensions are recommended for efficiency and security?

    - by Sanoj
    I am setting up an Ubuntu VPS server with nginx and PHP. I have read about many different configurations and extensions that could be added and it is pretty hard to know about all of them. I would like to hear from you, sysadmins, what PHP configuration and extensions do you recommend? I have read about: Suhosin for security Alternative PHP Cache for efficiency PHP FastCGI Process Manager for efficiency But I have no idea if they are good or not, and if I should use them together.

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  • How small is too small (of laptop for a programmer)

    - by defn
    Im thinking of replacing my HP Pavilion dv5-1004nr with Acer Aspire AS5738-6444, I'm a CS student... so im torn between screen size (liking the 15in and decent gpu.. but it weight nearly 8 pounds and battery can barely last 2 hours in power saver mode) and wanting something portable to carry to classes/take notes ect (3 pounds and up to 8 hour battery life of the acer) what would you guys suggest? acer any good? i love my hp keyboard.. (or have links to other good laptops, im aiming for 600$ range?)

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  • Flash crashing Mac?

    - by Bohdan Trotsenko
    In his recent blogpost, Thoughts on Flash, Steve Jobs says: We also know first hand that Flash is the number one reason Macs crash. My best guess is that Flash runs in user-mode, with restricted privileges. Is is impossible to crash a system having restricted privileges. What am I missing?

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  • Why is the installation of certain programs always such a pain in Linux [closed]

    - by Saif Bechan
    I am new to Linux and I am trying to set up a server. For this I sometimes to need to install special software, but the installation of this is always such a pain. For example I wanted to try the htscanner to see if it did the job for me. When i got to the page there is NO INSTALLATION guide. I had to search for the right one on google. Even on google its a pain to find the right method. Just try it - google search.After a long search and tried different things I finally found out that I had te install some more software before it will work. The website says that the version I used did not had any dependencies. Thats a lie. Release0.8.1: No dependencies registered. You do need certain things for it to work. After managing to set it up it still didn't work I can't figure out why because there is no official guide on the website. So I wanted to just uninstall it and find a better solution. Uninstalling. Uninstalling something in Linux is a real mystery how this actually works. The best answer I got is to manually look for the files and delete them. Whats up with that! There is never something said about uninstalling on the websites. Even on the website of CentOS itself it tels you how to install something like rpmforge packages (it's a miracle they tell you and not have to google it) but there is no mention of what to do when you want to uninstall. Why not? The forums you get on when trying to solve your problem are most of the time in plain text, and you have to scroll trough huge error logs before you see somethings that vaguely resembles your question if you are lucky. The Question My question is if there are any recommended websites / forums that explain the basic concepts of installing and uninstalling software on Linux. And explain other useful operations. And not Wikipedia or the first hits of Google, I have been there already. I am looking for some easy to read trough guides on these operations on Linux. I have been on a lot of websites that explain some Linux operation, but I bet its easier to get a degree in rocket science than to read trough the website and understand what they try to say.

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  • Is keeping the primary hard disk as disk C: still relevant?

    - by Jeremy French
    Back in the day, floppy disks were a: and if you were lucky b:, then when permanent storage came along c: was the default for hard disks (as I remember it) Now that many computers no longer have floppy disks is it possible to have your primary hard disk as A: is the convention out dated? Removable drives (like DVDs and flash readers) now seem to take lower precedence than permanent storage so it is a bit of an oddity that floppy disks should have higher letters.

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  • Firefox add-ons with a rich look and feel

    - by LiorH
    I am looking for examples of the "best looking" Firefox add-ons. By "best looking" I mean usable and stylish look and feel. I am not necessarily looking for "must have" add-ons but for examples of how rich an add-on can be. One add-on per answer, please.

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  • Preferred print drivers

    - by churnd
    As long as I can remember, the preferred print driver has been PCL5 or PCL6. It seems that PCL5 is going the way of the dodo, and PCL6 has more problems than I care to list here (pcl xl errors). It seems that the most reliable print driver these days is the PS (postscript) driver. Just wondering what everyone elses' experience has been and what kind of driver they prefer?

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