How To Display A Custom Password Requirement Message For Linux Password Changes

I have implemented a new passwd policy and am forcing users to change their password. The problem I’m facing is I don’t they dont’ know what the password requirements are. How can I communicate this to them before they change their password using passwd?

That’s a great question, and it’s actually really simple. What we have to do is create our own custom script that displays the password requirements and then calls the passwd program. And we have to call the script whenever  a user types passwd command at the prompt.



Linux Commands For Beginners: SUDO

Sudo, the one command to rule them all.  It stands for “super user do!”  Pronounced like “sue dough” As a Linux system administrator or power user, it’s one of the most important commands in your arsenal.  Have you ever tried to run a command in terminal only to be given “Access Denied?”  Well this is the command for you!  But, with great power comes great responsibility!  It is much better than logging in as root, or using the su “switch user” command.  Read on to see what sudo can do for you!



Ubuntu: Bumblebee, Optimus and Multi-Monitor Support

For those people who have made the switch to a laptop as their primary system, Linux has presented a bit of a problem. Some integrated devices have less than stellar support and even the proprietary binary graphics drivers have left something to be desired. Worse, modern laptops that contain the ‘Optimus’ technology (multiple GPU configurations – NVidia and Intel) either had to be used in one mode or the other (one or the other X Server, but not both). Enter the ‘bumblebee’ project. This project allows you to compile support onto your system to allow you to designate certain applications to use the discrete driver (NVidia) for better video/game performance but did not address the ability to use both video cards for desktop display of multiple monitors. Today, we will address that shortcoming.


Linux Penguin

CentOS Version 6.4: What You Need To Know

In March of this year, CentOS gathered all of the Red Hat Enterprise Linux upstream packages released and created the latest version of CentOS for distribution. We are going to talk about some of the changes and additions to this version so you can decide when is the right time for you or your organization to upgrade.

If you want to try it out now without upgrading your own systems, you can head on over to Linux Academy and check out their Linux training tracks. You get a personal server to use during all the online lessons and CentOS 6.4 is one of the distributions available right now.


Podcaste capture

Ping – The Common Man's Network Tool

The network tool ‘ping’ has been used by almost everyone who regularly uses a PC at one point or another. The tool is so ubiquitous that it is installed by default on every modern networkable operating system and has been for some time. It is both simple to use and can be a powerful means of exploring your network locally and the internet at large. We are going to go over some use cases and explain exactly what it is and how it works.