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  • Cheat Sheets for System Administrators?

    - by splattne
    I'd like to start a collection of good, free cheat sheet resources for system administrators. Please add your favorite ones. From the Wikipedia "cheat sheet" article: In more general usage, a "cheat sheet" is any short (one or two page) reference to terms, commands, or symbols where the user is expected to understand the use of such terms etc but not necessarily to have memorized all of them.

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  • Load Sharing Regarding Large Websites

    - by JHarley1
    Hello, I have a question regarding Load Sharing for large websites. My Understanding: So if you have a website that has millions of fits a day you will need to have an architecture that can support this sort of pressure. You can either do one or two things: Invest in a single large server that has huge amounts of processing power, memory and storage (such as Microsoft's TerraServer). Spread the load of your website across a number of machines. Let me tackle the second approach, so you have a collection of machines all running Web Server Software and all having access to identical copies of the websites pages. You can either spread the load across these machines using a cyclic pattern in a DNS or you can use a Load Ballancing Switch. The advantages of this approach is: - Redundancy - servers can fail and the others would "pick up the slack" - Incremental - the ability to easily add new machines to this set-up. My Question's Is there a Virtual approach to this issue of load balancing now? If the website runs from a database - is there still only a single copy of the database? If a user had a session running on one Server (e.g. they had gone to www.example.org and had been assigned to Server 2 - were they had created a session) if they refreshed the website (and were allocated Server 3) would they still have their session? What are the other disadvantages associated with Load Balancing? Many Thanks, J

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  • Best terminal unix editor to suggest to someone?

    - by Rory McCann
    What's the best terminal editor to suggest to a unix newbie? i.e. not vim or emacs. There are a few editors, joe, nano, etc. Some have easy to remember commands / keyboard shortcuts, others don't. I'm looking for an editor that one could talk someone through over the phone with, for remote sysadminning.

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  • Getting out of the Helpdesk. Getting into the system administration.

    - by eric.s
    Today I found out that the job which would have been a promotion for me went to an outside candidate. The position is for a systems admin on our LAN team. I have been working on the helpdesk here for almost two years with another two years experience working it prior. While we are the first tier support we also work in AD, monitor and update certain servers and set up and deploy Windows/Mac images for those we support. What I am looking for here is what can I do to better myself to inside/outside places to move up this ladder? I take what I can from my job - working on projects that I can learn from - but what projects should I be volunteering for? What can I do for myself outside to make me a more viable candidate for a systems admin?

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  • Linux Security/Sysadmin Courses in London?

    - by mister k
    Hi, My employer has offered to send me on a couple of training courses and I'm just looking for some recommendations. I'm mainly looking to improve my security and general sysadmin skills. I would like to do something focused on UNIX as I mainly work with Linux boxes (but also a couple of FreeBSD boxes). I don't want to do a study-from-home course, so I would need to find somewhere based in London. It would be great to hear from anyone who has some experience with this kind of course. The courses I've found so far are: www.learningtree.co.uk/courses/uk433.htm www.city.ac.uk/cae/cfa/computing/systems_it/linux.html www.city.ac.uk/cae/cfa/computing/systems_it/unix_tools_ss.html I'm not sure the City University courses are advanced enough as I already have experience... Thanks!

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  • Where should I go to learn about networking? [closed]

    - by Ollie Saunders
    I wonder if anyone could recommend resource or resources such as a good book that: explains how all the important protocols work and interact. I’m interested in those that are relevant in a typical home network and used over the Internet explains in detail how ADSL Internet connections work to the level of depth necessary so that I’m able to tweak and measure performance settings starts from the beginning but attempts to provide proper understanding rather than idiot-oriented steps to follow Basically, I’m interested in how these technologies work and tend to be implemented in hardware and software rather than “here’s what to do if…” I’m interested in Computer Networking by Andrew S. Tanenbaum and I wonder if anyone else has any experience with that title. It’s expensive but I could probably loan a copy for £3 from the library or so.

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  • Critical (Unixlike) Distros for Sysadmin Hopefuls to Have Experience With

    - by Interwebs
    Hi All, I'm trying to learn to be a Unix/Linux Sysadmin, and am hoping to get some hands-on experience by setting up a few installs (VMs, old comps, and the like) at home and practicing administering them. I was wondering, in the experience of those on this site, which distros are critical to be comfortable with. Obviously, to a certain extent, they're all similar, but there are substantial enough differences between administering, say, Debian, OpenSolaris, FreeBSD, and CentOS. So, which distros are most important to practice with in your opinion? Which have had most demand/come up most often in actual work situations? Thanks!

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  • F# and OCaml

    - by Erik Forbes
    I hear that F# is derived from OCaml. How true is this statement? That is to say, are the resources available for learning OCaml useful to someone who wants to learn F#? What are the major differences between the two languages (aside from the fact that F# is .NET)?

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  • OCR for Devanagari (Hindi / Marathi / Sanskrit)

    - by Egon
    Does anybody have any idea about any recent work being done on optical character recognition for Indian scripts using modern Machine Learning techniques ? I know of some research being done at ISI, calcutta, but nothing new has come up in the last 3-4 years to the best of my knowledge, and OCR for Devanagari is sadly lacking!

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  • Using Artificial Intelligence (AI) to predict Stock Prices

    - by akaphenom
    Given a set of datavery similar to the Motley Fool CAPS system, where individual users enter BUY and SELL recommendations on various equities. What I would like to do is show each recommendation and I guess some how rate (1-5) as to whether it was good predictor<5 (ie corellation coeffient = 1) of the future stock price (or eps or whatever) or a horrible predictor (ie corellation coeffient = -1) or somewhere inbetween. Each recommendation is tagged to a particular user, so that can be tracked over time. I can also track market direction (bullish / bearish) based off of something like sp500 price. The components I think that would make sense in the model would be: user direction (long/short) market direction sector of stock The thought is that some users are better in bull markets than bear (and vice versa), and some are better at shorts than longs- and then a cobination the above. I can automatically tag the market direction and sector (based off the market at the time and the equity being recommended). The thought is that I could present a series of screens and allow me to rank each individual recommendation by displaying available data absolute, market and sector out performance for a specfic time period out. I would follow a detailed list for ranking the stocks so that the ranking is as objective as possible. My assumtion is that a single user is right no more than 57% of the time - but who knows. I could load the system and say "Lets rank the recommendation as a predictor of stock value 90 days forward"; and that would represent a very explicit set of rankings. NOW here is the crux - I want to create some sort of machine learning algorithm that can identify patterns over a series of time so that as recommendations stream into the application we maintain a ranking of that stock (ie. similar to correlation coeeficient) as to the likelihood of that recommendation (in addition to the past series of recommendations ) will affect the price. Now here is the super crux. I have never taken an AI class / read an AI book / never mind specific to machine learning. So I cam looking for guidance - sample or description of a similar system I could adapt. Place to look for info or any general help. Or even push me in the right direction to get started... My hope is to implment this with F# and be able to impress my friends with a new skillset in F# with an implementation of machine learnign and potentially something (application / source) I can include in a tech portfolio or blog space; Thank you for any advice in advance.

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  • Is Silverlight hard to learn?

    - by Sahat
    Hi I understand I will be getting pretty subjective opinions but give it to me anyway. How hard is Silverlight for someone who has beginner-level knowledge of Java? On the scale of 1 to 10 how would you rate Silverlight learning difficulty?

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  • Netflix prize dataset?

    - by user169410
    Hi, I am looking to work on a machine learning project for my course and I would like to use the netflix prize dataset? But it looks like the contest is closed and the dataset is not available for download in the netflix website. Does anyone who wokred on it has the dataset? If so ,can u share it?

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  • Should I learn Python2 or Python3?

    - by Elena
    Hello everyone, I was thinking in learning a new language and settled for Python. But now that Dive into Python 3 is out, which one should I learn, 2 or 3? I am asking this also considering possible jobs for version 2 or 3. So, what do you think? Thank you!

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  • How to Practice Unix Programming in C?

    - by danben
    After five years of professional Java (and to a lesser extent, Python) programming and slowly feeling my CS education slip away, I decided I wanted to broaden my horizons / general usefulness to the world and do something that feels more (to me) like I really have an influence over the machine. I chose to learn C and Unix programming since I feel like that is where many of the most interesting problems are. My end goal is to be able to do this professionally, if for no other reason than the fact that I have to spend 40-50 hours per week on work that pays the bills, so it may as well also be the type of coding I want to get better at. Of course, you don't get hired to do things you haven't dont before, so for now I am ramping up on my own. To this end, I started with K&R, which was a great resource in part due to the exercises spread throughout each chapter. After that I moved on to Computer Systems: A Programmer's Perspective, followed by ten chapters of Advanced Programming in the Unix Environment. When I am done with this book, I will read Unix Network Programming. What I'm missing in the Stevens books is the lack of programming problems; they mainly document functionality and provide examples, with a few end-of-chapter questions following. I feel that I would benefit much more from being challenged to use the knowledge in each chapter ala K&R. I could write some test program for each function, but this is a less desirable method as (1) I would probably be less motivated than if I were rising to some external challenge, and (2) I will naturally only think to use the function in the ways that have already occurred to me. So, I'd like to get some recommendations on how to practice. Obviously, my first choice would be to find some resource that has Unix programming challenges. I have also considered finding and attempting to contribute to some open source C project, but this is a bit daunting as there would be some overhead in learning to use the software, then learning the codebase. The only open-source C project I can think of that I use regularly is Python, and I'm not sure how easy that would be to get started on. That said, I'm open to all kinds of suggestions as there are likely things I haven't even thought of.

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  • Reading one or more to understand ? [closed]

    - by Tarik
    I love coding and designing applications but there is something annoying me so much. Some times I can't focus and understand what I am reading when learning new code or a new subject or whatever and that really annoys me because It causes me to read again and again and again which really puts me off and frustrate me. Does something like this happen to you or is there some problem with me ?

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  • Applications for the Church Programming Language

    - by Chris S
    Has anyone worked with the programming language Church? Can anyone recommend practical applications? I just discovered it, and while it sounds like it addresses some long-standing problems in AI and machine-learning, I'm sceptical. I had never heard of it, and was surprised to find it's actually been around for a few years, having been announced in the paper Church: a language for generative models.

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  • ASP.NET: With C# or C# + VB.NET?

    - by Sahat
    I am currently reading Beginning ASP.NET 4: in C# and VB (Wrox Programmer to Programmer) and it comes with both C# and VB.NET source code. I am definitely planning to use C# in the future for most of my projects. But VB.NET - is it really worth learning side-by-side with C#? Are there such cases when VB.NET is preferred over C#?

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  • How different is python2.x from python3.x

    - by michael
    I'm starting to learn python right this instant. I have the old Dive Into Python book, but I see there's another one for v3. What am I going to learn that I'll have to unlearn later? If you were to start learning Python today which version would you pick?

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  • Good Tutorial To Learn C++ Development For Game Boy

    - by Nathan Campos
    I'm learning C++ with this book of Deitel: C++ How to Program, 5/e and some tutorials and resources of the internet, but i want to learn how i can develop Nintendo GameBoy Advance games using C++, but only in resources over the internet, because i don't want to spent money now with a thing that i only want to try.

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  • Classification of relationships in words?

    - by C.
    Hi, I'm not sure whats the best algorithm to use for the classification of relationships in words. For example in the case of a sentence such as "The yellow sun" there is a relationship between yellow and sun. THe machine learning techniques I have considered so far are Baynesian Statistics, Rough Sets, Fuzzy Logic, Hidden markov model and Artificial Neural Networks. Any suggestions please? thank you :)

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  • What C++ pitfalls should I avoid ?

    - by Craig H
    I remember first learning about vectors in the STL and after some time, I wanted to use a vector of bools for one of my projects. After seeing some strange behavior and doing some research, I learned that a vector of bools is not really a vector of bools. Anyone out there have any other common pitfalls to avoid in C++?

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