S3ba’s Blog

See this article to know how many secure are your conversation with your preferred program of instant messaging. The following table resume the article:

Lifehacker do a simple and "unscentific" speed test between most user browsers: Internet Explorer 7.0.6, Safari 3.1.1, Opera 9.5 and Mozilla Firefox 3 RC3; the system for the test is a Windows Vista (32 bit) machine with an Intel core duo2GHz) processor and 2 GB of RAM. On the whole the best browser is Opera 9.5: it is the faster at startup-time and in javascript test and second in multi-tab load time, CSS test, and memory usage with 8 tabs open. Firefox 3 RC3 win the test of memory use, this is a real improvement compared with the previous version of firefox. See the test.

Opera Software, before the release of firefox 3, has released his browser of new generation: Opera 9.5. The new version of browser introduces excellent performance and  an improvement of the support to standard web: opera pass without problem the Acid 2 test.

 This version introduces some interesting innovations:

1) Quick find: now is possible to search a web page, already visited, simply writing in the addrress bar the content of the page.

2) With opera link is possible to save in the web our bookmarks and preferences.

3) Dragonfly: is a tool for web developer like firebug in firefox.

  The 17 June 2008 is the date for the launch of Firefox 3.

To erase definitively all the data stored in an hard disk (floppy, pen drive, etc) the simple formatting is not enough, in fact is possible, with specified software, recover the "lost datas": this because the formatting or the process of deleting file don’t erase the file, but the link to hard disk sector where the effective file is stored, until this sector don’t be overwrite by another file.

Usually to way clean totally an hard drive is to write the drive with the pattern 0×00; in linux is possible to use the programm dd, an the command is:

# dd if=/dev/zero bs=4096 of=/dev/hdaX

 dd read in input the content of the device /dev/zero and write it in the destination device (/dev/hdax); the program read and write  4096 bytes at at time.