Question: I’m unable to do su – on Ubuntu. It says “su: Authentication failure”. How do I fix it? Also, is it possible for me to login to Ubuntu using root account directly?
Answer: Let us address these two question one by one.
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Ubuntu Tips
Question: What is a timed login in Ubuntu or Kubuntu ? How does it work?
Answer: If you have created a guest account on your laptop, you may want the guest account to automatically login when you reboot the machine.
But, wait. You don’t want that guest account to login automatically when you want to login using your account.
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Ubuntu by default comes with a very decent theme, back ground image, and font. However if you are bored with the default Ubuntu appearance, you can change those as explained in this article.
This article explains how to change Ubuntu Themes, background images, fonts and visual beeps.
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Question: Firefox 3 is very slow on my Ubuntu. How do I fix it? Some of the symptoms are — Scrolling on a web page is very sluggish, running flash on Firefox is slow, watching YouTube videos on Firefox is slow.
Answer: Try one of the following suggestions, which may solve the Firefox running slow problem on Ubuntu.
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Question: How do I open Firefox browser (or any application) automatically when I login to Ubuntu or Kubuntu ?
Answer: In gnome you can do this by using the gnome-control-center (or) directly from the “Startup Application Preferences” as explained in this article.
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Question: How to enable automatic login in Ubuntu or Kubuntu ?
Answer: You can enable auto login in Ubuntu using the following 3 simple steps.
Please understand that it is not security best practices to enable the automatic login. Do this only if you are in a controlled environment and very confident that nobody will have physical access to the system except you. You may like this feature if you have a system that doesn’t have any sensitive information and you use it only to browse internet. On those systems, you may want to setup a guest account and enable automatic login for guest account as explained below.
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My name is Ramesh Natarajan. I will be posting instruction guides, how-to, troubleshooting tips and tricks on Linux, database, hardware, security and web. My focus is to write articles that will either teach you or help you resolve a problem. Read more about