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Linux » Linux Journal Weitere Quellen
Linux Journal  
Since 1994: The Original Monthly Magazine of the Linux Community
»Users, Permissions and Multitenant Sites 
 

In my last article, I started to look at multitenant Web applications. These are applications that run a single time, but that can be retrieved via a variety of hostnames. more>>

»New Products 
 
Please send information about releases of Linux-related products to newproducts@linuxjournal.com or New Products c/o Linux Journal, PO Box 980985, Houston, TX 77098. Submissions are edited for length and content.
»Flexible Access Control with Squid Proxy 
 

Large enterprises and nuclear laboratories aren't the only organizations that need an Internet access policy and a means of enforcing it. My household has an Internet access policy, and the technique I've used to enforce it is applicable to almost any organization. In our case, I'm not too concerned about outside security threats. more>>

»Solving ODEs on Linux 
 

Many problems in science and engineering are modeled through ordinary differential equations (ODEs). An ODE is an equation that contains a function of one independent variable and its derivatives. more>>

»DevOps: Everything You Need to Know 
 
Devops Linux Journal
Have projects in development that need help? Have a great development operation in place that can ALWAYS be better? more>>
»Tighten Up SSH 
 

SSH is a Swiss Army knife and Hogwart's magic wand all rolled into one simple command-line tool. As often as we use it, we sometimes forget that even our encrypted friend can be secured more than it is by default. For a full list of options to turn on and off, simply type man sshd_config to read the man page for the configuration file. more>>

»Security in Three Ds: Detect, Decide and Deny 
 

Whenever a server is accessible via the Internet, it's a safe bet that hackers will be trying to access it. Just look at the SSH logs for any server you use, and you'll surely find lots of "authentication failure" lines, originating from IPs that have nothing to do with you or your business. more>>

»Non-Linux FOSS: MenuMeters 
 

It sounds like a "back in my day" story, but I really do miss the days when laptops had LED activity lights for hard drives and Wi-Fi. Sure, some still have them, but for the most part, the latest trend is to have no way of knowing if your application is pegging the CPU at 100%, or if it just locked up. more>>

»Android Candy: Bluetooth Auto Connect 
 

I love my latest Android device (see the March 2015 issue's Open-Source Classroom column for details), but for some reason, it won't automatically connect to my Bluetooth headset. When I turn on my headset, I want it to connect to my Android device so I can start using it right away. more>>

»diff -u: What's New in Kernel Development 
 

Nicolas Dichtel and Thierry Herbelot pointed out that the directories in the /proc filesystem used a linked list to identify their files. But, this would be slow when /proc directories started having lots of files, which, for example, might happen when the system needed lots of network sockets. more>>

»Geek Guide: The DevOps Toolbox 
 

When I was growing up, my father always said, "Work smarter, not harder." Now that I'm an adult, I've found that to be a core concept in my career as a DevOps engineer and manager. In order to work smarter, you've got to have good tools and technology in your corner doing a lot of the repetitive work, so you and your team can handle any exceptions that occur. more>>

»Nmap—Not Just for Evil! 
 

If SSH is the Swiss Army knife of the system administration world, Nmap is a box of dynamite. It's really easy to misuse dynamite and blow your foot off, but it's also a very powerful tool that can do jobs that are impossible without it. more>>

»Resurrecting the Armadillo 
 

1999 was a crazy year for business on the Internet, and for Linux. It was when Red Hat went public, with a record valuation, and VA Linux followed with a bigger one. Both were cases in point of the dot-com boom, a speculative bubble inflated by huge expectations of what the Internet would mean for business. more>>

»March 2015 Issue of Linux Journal: System Administration 
 

System administration is a very general term. It's our job to fix problems, repair systems and remind people to try power cycling their troubled desktops. more>>

»High-Availability Storage with HA-LVM 
 

In recent years, there has been a trend in which data centers have been opting for commodity hardware and software over proprietary solutions. Why shouldn't they? It offers extremely low costs and the flexibility to build an ecosystem the way it is preferred. The only limitation is the extent of the administrator's imagination. more>>

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