Neurons to Electrons

How to change MAC address | All about Linux

Parallel Computing parallel computing is the way of using two or more processes (with other underling infrastructure) for a computation. These elements contains: Multiple Processors multiple Memories Interconnection Network The operation of above elements are subject to the control by parallel Operating System Which contains special parallel algorithms for process handling. The ultimate goal of parallel computing is to reduce the time for a computation and to facilitate computing, which requires high memory usage: Achieve speed: Tp=Ts/p Solve problems requiring a large amount of memory Logical Organization: Logical organization is referred to the way the parallel platform is viewed to application level. Logical organization contains many control mechanisms SISD-Single Instruction Single data SIMD-Single Instruction Multiple data MIMD- Multiple Instruction Multiple data MISD- Multiple Instruction Single data Single Instruction Mu...

chandpriyankara in Launchpad

Social Engineering Fundamentals, Hacker Tactics A True Story One morning a few years back, a group of strangers walked into a large shipping firm and walked out with access to the firm’s entire corporate network. How did they do it? By obtaining small amounts of access, bit by bit, from a number of different employees in that firm. First, they did research about the company for two days before even attempting to set foot on the premises. For example, they learned key employees’ names by calling HR. Next, they pretended to lose their key to the front door, and a man let them in. Then they "lost" their identity badges when entering the third floor secured area, smiled, and a friendly employee opened the door for them. The strangers knew the CFO was out of town, so they were able to enter his office and obtain financial data off his unlocked computer. They dug through the corporate trash, finding all kinds of useful documents. They asked a janitor for a garbage pail in whi...

In this tutorial I'm using an Ubuntu 10.04 system with two hard drives, /dev/sda and /dev/sdb which are identical in size. /dev/sdb is currently unused, and /dev/sda has the following partitions: /dev/sda1 : /boot partition, ext4; /dev/sda2 : swap; /dev/sda3 : / partition, ext4 In the end I want to have the following situation: /dev/md0 (made up of /dev/sda1 and /dev/sdb1 ): /boot partition, ext4; /dev/md1 (made up of /dev/sda2 and /dev/sdb2 ): swap; /dev/md2 (made up of /dev/sda3 and /dev/sdb3 ): / partition, ext4 This is the current situation: df -h root@server1:~# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda3 4.0G 808M 3.0G 21% / none 243M 168K 243M 1% /dev none 247M 0 247M 0% /dev/shm none 247M 36K 247M 1% /var/run none 247M 0 247M 0% /var/lock none 247M 0 247M 0% /lib/init/rw ...