Solved : Failed to save main TiddlyWiki file. Your changes have not been saved

This usually means that the disk is full. Try deleting/moving some files from the drive and then resave the Wiki! This however does not revive the Wiki though. So have some backup measures.  

More free online classes – for anyone across the World!

There existed OpenCourseWares from MIT, CMU, Stanford and a host of other Universities. Though the students could take these videos any time they liked, there did not exist a goodonline common platform for the students to discuss and get things cleared. To alleviate this problem, there has recently been a surge in the number of […]

PHP on Linux (Ubuntu 11.04 – Natty Narwhal)

These are some of the codes that helped me getting started in using Apache server on Ubuntu 11.04 (Natty Narwhal) Finding out the user group <?php // outputs the username that owns the running php/httpd process // (on a system with the “whoami” executable in the path) echo exec(‘whoami’); ?> (often it is www-data ) source : Check you have the permission. If not change the pormissions for the var/www folder on Linux (in […]

Research Tools

I was searching for a tool to extract the relevant data from PDFs ( mainly resaerch papers from various journals etc, some book chapters and some old free ebooks ) and to export the metadata for citation. A summary of a few tools I came across .. NOTE: Some tools are desktop tools , some […]

View All Mozilla Passwords

I wanted to switch from Windows to Linux. Was searching for options to export my Mozilla passwords. Have gathered a couple of links here Option 1 : In Mozilla firefox, goto Tools->Error Console and then copy and paste the following code into it. All the passwrods are exported in [javascript] (function(){ function twodigits(string) {return (string.length < […]