I was working with a coworker today to setup a new Redmine server running on top of Ubunut 12.04 and one of the steps we completed in the process was setting up LDAP authentication in Redmine. Setting up LDAP authentication in Redmine requires the server running Redmine to be joined to the Windows Active Directory domain so I needed a quick way to auth Linux on Active Directory. I have used Centrify in the past and remember it being really easy to setup authentication from any form of Linux to a Windows domain and again it did not disappoint. Follow the directions below to join a Linux server to Active Directory using Centrify.

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Earlier today I was troubleshooting NFS or Network File System issues on a Ubuntu Linux server and ran into some specific errors. Luckily the errors were easily resolved by restarting portmap on the server. Below I show the error output on the server end in more detail, how to resolve the issue, and testing the Network File System mount from OSX.

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I have been using the cut command a lot recently to shed extra data from large text files. I typically use cut with a specific delimiter by activating the -d switch and I thought that the -d switch was required. It turns out that -d is not required and by default -d actually defaults to the delimiter being a tab. When you need to have a tab as the delimiter for cut you simply don’t specify the -d switch. Below I show a couple examples of a file trimmed down using cut with and without the -d switch as well as another way to convert tabs in a file to spaces which then will allow you to use the Linux cut command with the -d” ” switch.

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Since I write a lot of articles about Backtrack Linux it is nice to have keyboard shortcuts for different screenshot commands. The two screenshot commands that I use most in Backtrack are “gnome-screenshot -w” and “gnome-screenshot”. The gnome-screenshot command will take a screenshot of the entire desktop while “gnome-screenshot -w” will take a screenshot of the active window only. Below I describe setting up  keyboard shortcuts for each of these commands on Backtrack Linux. The below information will work the same on Ubuntu 10.04 as it does on Backtrack Linux since that is what the current Backtrack Linux version (Backtrack 5 release 3) is built on.

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MapPress is a WordPress plugin that provides an interface to Google Maps and easily allows you to insert detailed Google Maps into WordPress posts or pages. We have a site that provides password auditing services called QD Tools and on the homepage there is a map that lists the city, state/province, and country of our customers. I have been using MapPress Pro for a long time because it offers lots of extra features and MapPress itself is such an awesome plugin I like supporting the developer. Anyhow the Google Map on the QD Tools homepage is has over 1,000 markers and continues to grow. I wanted to modify the default MapPress/Google Maps marker that was being used but there is no way in MapPress to retroactively change this so the instructions below explain how to do this.

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