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In this tutorial, we will examine the process of installing Zimbra mail server in CentOS Linux environment. Zimbra is my personal favorite when it comes to open-source mail servers as it comes with a number of useful features such as built-in calendar support, email filtering rules, a modern interface for both users and admins, spam …Continue reading...
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How to print “optimized out” value in gdb

http://ask.xmodulo.com/print-optimized-out-value-gdb.html

#linux   #gdb   #programming  
Question: I was debugging a program with gdb debugger. When I tried to print the value of a variable while tracing a function call, gdb says "<value optimized out>", not displaying the value. How can I show the value of an <optimized out> variable in gdb? Modern compilers such as gcc are able to perform …Continue reading...
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How to set up a self-hosted project management web app on Linux

http://xmodulo.com/self-hosted-project-management-web-app.html

#linux   #productivity   #opensource   #projectmanagement  
When a group of employees collaborate on a project, there is need for handling all aspects and complexities of the project from start to finish, such as task assignment, scheduling, budget management, communication, documentation, and so on. Thus a good project management tool is a necessity for any kinds of businesses or organizations which are …Continue reading...
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Free software licenses (by David A. Wheeler)

#foss #opensource #copyright
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How to allows incremental file sync for many users on Linux

http://xmodulo.com/incremental-file-sync-many-users.html

#linux #filesync #sysadmin #opensource
Suppose you as a software developer has set up daily builds of your software for testing purposes. Every day you make a new build, users have to re-download the updated build to evaluate it. In this case you want to enable differential downloads, so that users can download only difference between two builds, thereby saving …Continue reading...
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Cacti is a popular network graphing tool widely used by many service providers. For those of you who have been using Cacti to visualize the performance of various elements of your network, it is sometimes necessary to migrate Cacti and all its graph datasets from one server to another. Why? The current server may be …Continue reading...
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Question: How can I create a bar graph (bar chart) using Gnuplot? A bar graph is a plot which visualizes data values using proportional-size bars. Bar charts are useful when you want to compare multiple items among different categories. As you can imagine, they are much more effective than a table of numerical data. This …Continue reading...
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Question: I am troubleshooting Ethernet bridging which I set up with a Linux bridge, and I would like to disable MAC learning on the Linux bridge. How can I do that? An Ethernet bridge is a network component which interconnects multiple Ethernet networks by forwarding packets from one network to another. Linux has a software …Continue reading...
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How to enable .htaccess in Apache HTTP server

http://ask.xmodulo.com/enable-htaccess-apache.html

#linux #apache #sysadmin
Question: I wanted to use .htaccess file to configure something for my website running on Apache web server. But the .htaccess file I placed in the website's document root directory is not working. How can I enable .htaccess in Apache web server? An .htaccess file is a directory-level configuration file for Apache HTTP server, which …Continue reading...
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Have them in circles
2,534 people
Lal Krishna's profile photo
Mahmoud Kandeel's profile photo
Adam Stokes's profile photo
Hamid Kamiss's profile photo
Marco Petutschnig's profile photo
Hasiya Rulz's profile photo
Matthew Hanna's profile photo
Terrence Fuller's profile photo
Francis Rodrigues's profile photo
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Linux FAQs, tips and tutorials, covering server administration, Linux desktop environment, Linux open-source software and cloud services.