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A new variant of Gpcode virus is out and targeting all Windows systems. It is a dangerous file-encryptor. It encrypts a whole variety of user files, targeting files with extensions such as DOC, TXT, PDF, XLS, JPG, PNG, CPP, H etc using rsa encryption. Once file encrypted it displayed following message on screen demanding ransom:

Your files are encrypted with RSA-1024 algorithm.
To recovery your files you need to buy our decryptor.
To buy decrypting tool contact us at: ********@yahoo.com

RSA-1024 algorithm / encryption is pretty strong and any attempt to break it will result in nothing. According to this blog posting it will take 5 million modern computers to crack a key:

Along with antivirus companies around the world, we're faced with the task of cracking the RSA 1024-bit key. This is a huge cryptographic challenge. We estimate it would take around 15 million modern computers, running for about a year, to crack such a key.

This also makes hard drive data recovery difficult. Your best choice against such attack is backup data regularly and move to offsite. Now virus writer using rsa security to black mail you. Any OS (Windows is big target for this kind of attacks) can be open to such attack and only backups can protect you.

Linux Administrative tasks LPI exam tutorial

This tutorial is organized according to the specific objectives of the LPI exam for this topic. This tutorial can help you study for certification -- or simply build a solid foundation in Linux system administration.

In this tutorial, Ian Shields continues preparing you to take the Linux Professional Institute Junior Level Administration (LPIC-1) Exam 102. In this sixth
in a series of nine tutorials, Ian introduces you to administrative tasks. By the end of this tutorial, you will know how to manage users and groups, set user
profiles and environments, use log files, schedule jobs, back up your data, and maintain the system time.

LPI tutorial topics

  • Manage user and group accounts
  • Tune user and system environments
  • Configure and use system log files to meet administrative and security needs
  • Automate system administration tasks by scheduling jobs to run in the future
  • Maintain an effective data backup strategy
  • Maintain system time

LPI exam 102 prep, Topic 111: Administrative tasks Junior Level Administration (LPIC-1) topic 111 (free registration required)