Month: March 2015

Link: Create an Apple ID without using a Credit Card

Some apps, Google Earth for example, are available as free downloads in the iTunes Apps store but you need a UK or US based Apple ID to install them on to your iPad or Phone. Similarly, some iBooks and podcasts have geo restrictions and may only be available to iTunes users who are logged in with an Apple ID for one of the available countries.

The workaround is simple…..

Full article here:
Create an Apple ID without using a Credit Card (Digital Inspiration)

Links: Linux Fundamentals, Parts 1-4

Welcome to “Linux fundamentals,” ….. designed to prepare you for the Linux Professional Institute’s 101 exam. ….. By the end of this series of tutorials (eight in all), you’ll have the knowledge you need to become a Linux Systems Administrator and will be ready to attain an LPIC Level 1 certification from the Linux Professional Institute if you so choose.

Full articles here (source: funtoo linux):
Linux Fundamentals, Part 1
Linux Fundamentals, Part 2
Linux Fundamentals, Part 3
Linux Fundamentals, Part 4

Link: Linux Troubleshooting: How To Keep A Process Running After Putty Or SSH Session Closed?

Mostly, I use SSH command to connect to my remote server. Unfortunately, today the power is gone and the Ethernet hub is turned off, so my SSH session was lost. What do you do if an important task is going on after losing your SSH session? Here is the simple tool called Tmux to keep a process running  after the SSH or Putty session lost.

Full article here:
Linux Troubleshooting: How To Keep A Process Running After Putty Or SSH Session Closed? (Unixmen)

Link: 6 Cool Uses of Linux Live CDs

One of the good (or bad) things about Linux is that there are a lot of different distributions and almost all of them come in the form of live CDs. For the casual user, you might be wondering why in the world you need a live Linux CD when you have a functional operating system installed in your system. Here are some of the reasons why you should always have a Linux live media, and it might even save your computer’s life.

Full article here:
6 Cool Uses of Linux Live CDs (Make Tech Easier)

Link: Understanding Linux File Permissions

The Unix operating system (and likewise, Linux) differs from other computing environments in that it is not only amultitasking system but it is also a multi-user system as well.

…..

In order to make this practical, a method had to be devised to protect the users from each other. After all, you could not allow the actions of one user to crash the computer, nor could you allow one user to interfere with the files belonging to another user.

This lesson will cover the following commands:

  • chmod – modify file access rights
  • su – temporarily become the superuser
  • chown – change file ownership
  • chgrp – change a file’s group ownership

Full article here:
Understanding Linux File Permissions (Project: Fenix)

Link: How to Create YouTube Playlists without Logging In

There’s however a simple URL hack that will let you create “virtual” playlists on YouTube – they are like regular playlists except that they are not connected to any Google account and you can still add or remove videos on the fly.

Full article here:
How to Create YouTube Playlists without Logging In (Digital Inspiration)

Link: 5 Grep Tools for Linux

As every Linux user surely knows, grep is a reliable command-line tool for in-depth file searching. Still, many beginners avoid it because they dislike the terminal. The apps presented in this article aren’t exactly alternatives to grep because in some usage scenarios grep is truly irreplaceable. Instead, let’s call them visual upgrades for grep because they extend grep’s functionality and wrap it in a full-fledged graphical interface.

Full article here:
5 Grep Tools for Linux (Make Tech Easier)

Link: Security in Three Ds: Detect, Decide and Deny (using DenyHosts to stop brute-force SSH attacks)

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. Brute-force attempts (such as “dictionary attacks”) try different passwords over and over to try to get into your box, and there’s always a chance that they eventually will succeed. Thus, it’s a good idea to apply these “three Ds” for your security: detect intruder attempts, decide when they’ve gone “over the top” (past what would be acceptable for honest-to-goodness typing mistakes), and deny them access at least for a (longish!) while.

Several tools manage this kind of monitoring (see the Resources section). In this article, I describe installing, configuring and running DenyHosts. With it, you’ll have a running background dæmon that will check your system continuously for access attempts, decide if they look unsafe, block them and inform you. DenyHosts even can be configured to share information with other servers, so whenever a hacker is detected on one system, it will be blocked on other systems too.

Full article here:
Security in Three Ds: Detect, Decide and Deny (Linux Journal)

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