Skip to main content

Ubuntu Broken Upgrade, Lost GUI, /dev/null: Permission denied

I am toying with Karmic's alpha releases. So, in comes a new partial upgrade rolled out and I chose to get it. At the end of the upgrade, I had a rare - stuck linux - situation. So I hard rebooted; Only to find that the system now restarts to a GDM that is broken. It gets to a blank screen with a *loading* mouse icon. I was contemplating a complete redo(download the daily build for karmic and install it).

However, I thought its worth troubleshooting. So on that blank GDM screen, I pressed Ctrl+Alt+F2 to open a tty. When I logged in, I got a lot of
/dev/null: Permission denied
Apparently, My upgrade dint finish well. First thing that came to my mind is to reconfigure the whole setup.
sudo dpkg --configure -a
But I was getting the same errors /dev/null: Permission denied.

Pretty much everything I did got me to the same error. I rebooted to my Jaunty install. A quick search showed me how I could install this all important /dev/null.

All you have to do was to remove and recreate it.
sudo rm /dev/null
sudo mknod -m 0666 /dev/null c 1 3

That should save me 2hrs :). So much for "null".

Popular posts from this blog

Add jquery in Chrome console

Many a time, a page you are debugging doesnot have jquery. This simple js will add(or prompt you to overwrite) jquery to any page from chrome console.

javascript:if(!window.jQuery||confirm('Overwrite\x20current\x20version?\x20v'+jQuery.fn.jquery))(function(d,s){s=d.createElement('script');s.src='https://ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.js';(d.head||d.documentElement).appendChild(s)})(document);

Javascript: Convert Strings to Binary (and representing in a nerdy way!)

I follow those GoogleDevelopers Videos. Sometime back, in one of the presentations on GoogleIO, there was this interesting string of dots at the bottom of each page of the presentation. They looked like random big and small dots. A similar bunch of dots were also on the T-shirt of a presenter was wearing in another presentation. While it seemed something in the pattern, I could not find what it was. Finally, another presenter cleared the matter that those dots are just binary representation of "GOOGLEIO" (So much for advertizing Google IO, Impressive!).

So I wanna do it. Takes me back to days of those DSP classes at school. Nerdy me had to churn some old brain cells. I remember those first programming language classes in Pascal and C when you were asked to do fibonacci series and converting a binary string to ascii codes. That *experience* came handy here: Check it out!

Text to Binarize:
For those who came to copy the javascript code to convert string to binary, Here it is…

The easiest way to install docker on Ubuntu

Docker releases come out faster than ubuntu updating thier repositories. Docker mainitains a ppa. One can add the ppa key, and then add to sources.list.d and then update sources and then install lxc-docker. OR..
curl -sSL https://get.docker.com/ubuntu/ | sudo sh