1. How To Disable Hibernate Option?
Hibernate option in Windows 7 and Windows Vista takes upto 8 Gigabytes (GB) in a hard disk. To disable such hibernate option may lead to free and increase 8 GB of hard disk space. To do this just follow the given steps here:
1. Click start menu and open Run.
3. Click OK.
4. From an administrative command prompt type "powercfg -h off " without quotes. This command will get that space back.
5. After writing or we can say firing this command will free or increase your 8GB around hard disk space.
2. Don't Know The Difference Between 1Kbps-1KBps and 1Mbps-1MBps ?
There is a small difference which makes a huge difference in Mbps and MBps. Many people get confuse in these terms and do get happy when they hear that their internet speed is 1Mbps but actually it is 128KBps and after that they complain that my internet speed is 1Mbps still it does not download a 4MB file in 4 seconds.
Actually Kbps means Kilo Bits Per Second. Bytes is a huge amount in relation to networking so most network operators give the data transfer in Kilo Bits not in Kilo Bytes but all the computer files are in Bytes.
Now to convert Bits to Bytes divide that data by 8 because 1 Byte = 8 Bits. So next time when you buy a modem or get a connection must check 'b' or 'B' and then find out the real speed of your internet connection.
3. Delete Administrative Password Without Any Software:
Here I have given steps to delete adminstrative password without any software:
1. Put the hard disk of your computer into another computer.
2. Now boot that computer and use your hard disk as a secondary hard disk. But keep in mind that don't boot as primary hard disk.
3. Now open that drive in which your main computer's window is installed.
4. Now reach to this location : windows ---- system32 ----- config
5. Then delete the SAM.exe and SAM.log
6. Now remove the hard disk from the second computer and put it into your main computer.
7. Now start booting your computer.
8. That's it.
4. Deadly Linux Commands That Can Destroy One System:
1. Command > rm -rf /
What it does : It will Delete Everything
Explanation : It is a combination of three keywords.
First is : rm It will remove all the files followed by this command.
Second is : -rf This will run rm command in more effective way and will remove everything ( all files and folders inside the specified folder )without asking confirmation from the user.
Third is : / This will start removing the data from the root directroy and will delete everything from the computer including the data of removable media.
2. Command > :(){ :|: & };:
What it does : Shell function that gets repliacated.
Explanation : This command creates a shell function , which once get initialized starts to create multiple copies of itself.It results in taking quickly all the memory and power of CPU.It makes computer freeze or not responding. This is also known as Denial Of Service Attack.
3. Command > mkfs.ext4 /dev/sda1
What it does : This command will format the hard disk
Explanation : This command is again composed of two keywords.
First is : mkfs.ext4 : This part of command will create a new ext4 file system on following device where this command will get executed.
Second is : /dev/sda1 ;This part of command specifies the 1st partition on the first hard disk which is probably in use by the user. Similarly, This Command > mkfs.ext3 /dev/sdb2 will Format the second partition on the second hard disk with ext3 File system.
4. Command > /dev/sda
What it does : Write Any content Directly to a Hard Drive.
Explanation : This command will execute normally as other commands in linux do. But output of this command will directly be sent to the file system (NTFS or FAT ) of the Hard Drive. It will result into damaging the file system of the computer.
5. Command > mv ~ /dev/null
What it does : Beware it Will Move your Home Directory To Black hole.
Explanation : Moving any of your content and data to following path : /dev/null means you want to destroy it.It means /dev/null is a black hole where once anything sent , can not be recovered back.
Note:
Many of these commands will only be dangerous if they’re prefixed with sudo on Ubuntu – they won’t work otherwise. On other Linux distributions, most commands must be run as root.
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