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  SSH Security and You - /bin/false is *not* security


Backstory While at RIT around 2004 or 2005, I discovered that a few important machines at the datacenter allowed all students, faculty, and staff to authenticate against them via ssh. Everyone's shells appear to be set to /bin/false (or some derivative) on said machines, so the only thing you'll see after you authenticate is the login banner and your connection will close. I thought to myself, "Fine, no shell for me. I wonder if port forwarding works?" ...

   Linux,Security,/bin/false,SSH     2012-02-06 07:46:29


  5 Ways to Boost MySQL Scalability


There are a lot of scalability challenges we see with clients over and over. The list could easily include 20, 50 or even 100 items, but we shortened it down to the biggest five issues we see.1. Tune those queriesBy far the biggest bang for your buck is query optimization. Queries can be functionally correct and meet business requirements without being stress tested for high traffic and high load. This is why we often see clients with growing pains, and scalability challenges as their site becom...

   MySQL,Scalability,Methods,Implementation,Practice     2011-10-18 02:57:27


  Memory related exception analysis in Java


Java Virtual Machine Specification divides the memory of JVM into several areas : Heap, Stack, The Program Counter register and Method area etc. In HotSpot JVM, heap is composed of Young, Tenured and Perm. There are different OutOfMemory error can happen in different memory area. Next is an overview of some of these OOM errors. StackOverflowError The JVM will allow only a specified number of stacks created nested. An JVM option -Xss can be set to determine the maximum stack size. If the num...

   Java, Memory model, Memory exception, OOM     2015-01-19 06:54:27


  10 things you gotta have to succeed in IT


Takeaway: Everyone seems to agree that IT is a tough field. But what does it take to overcome the adversities and become a successful IT pro? These qualities may be the key. I recently wrote a string of articles discussing various reasons to leave IT — and various alternative careers for dissatisfied IT workers. I received an amazing amount of feedback from readers who have always wanted to express similar sentiments. But that leaves out a huge swath of people: ...

   Tips,IT,Development     2011-07-21 21:55:13


  I'm Retiring from PHP


I am retiring from PHP as my language of choice for personal side projects and new programming ventures. This was not an easy decision to come to, but one that I think is necessary for my love of programming to continue. You see, I'm not only a programmer because I love programming, but because I can not do anything else. History It all started in 1999 when I was in 8th grade. The Internet was really starting to get interesting and I wanted to start programming. I had picked up...

   PHP,Scala,Programming,Language     2011-06-27 07:36:25


  What to Look for in PHP 5.4.0


PHP 5.4.0 will arrive soon. The PHP team is working to bring to some very nice presents to PHP developers. In the previous release of 5.3.0 they had added a few language changes. This version is no different. Some of the other changes include the ability to use DTrace for watching PHP apps in BSD variants (there is a loadable kernel module for Linux folks). This release features many speed and security improvements along with some phasing out of older language features (Y2K ...

   PHP,5.4,New feature,Built-in server,Trait     2011-12-21 10:20:12


  C++11 multithreading tutorial


The code for this tutorial is on GitHub: https://github.com/sol-prog/threads. In my previous tutorials I’ve presented some of the newest C++11 additions to the language: regular expressions, raw strings and lambdas. Perhaps one of the biggest change to the language is the addition of multithreading support. Before C++11, it was possible to target multicore computers using OS facilities (pthreads on Unix like systems) or libraries like OpenMP and MPI. This tutorial is meant to get you started...

   C++,Multithreading,Standard 11,Demo     2011-12-18 00:50:35


  Introducing JavaScript native file management


TL;DR The Mozilla Platform keeps improving: JavaScript native file management is an undergoing work to provide a high-performance JavaScript-friendly API to manipulate the file system. The Mozilla Platform, JavaScript and Files The Mozilla Platform is the application development framework behind Firefox, Thunderbird, Instantbird, Camino, Songbird and a number of other applications. While the performance-critical components of the Mozilla Platform are developed in C/C++, an increasing number o...

   JavaScript,File,Local file,Firfox,Mozilla     2011-12-06 09:05:48


  Useful Bash Scripts


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 ...

   Linux,Shell,Bash,Command,Robust     2012-01-15 10:28:00


  Why I Still Use Emacs


At school, I’m known as the Emacs guy; when people have questions about configuring Emacs or making it work a certain way, they often come and ask me. Sometimes, some people ask me why use Emacs at all? Isn’t it a really old editor and aren’t Eclipse or Visual Studio much better? I mean, they don’t have weird key bindings and have intellisense, that’s surely better for a programmer, right? I will attempt in this post to explain some of the reasons why I still cling to Emacs. Believe me...

   Linux,Emacs,Editor,Advantage,IDE     2012-02-20 05:30:41