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How to backup hard disk timely? Use Time Shuttle to backup your hard disk by takeing snapshots and thus to prevent data loss.
Introduce three main ways to restore system. System restore is an effective way to solve most of system problems. Traditional methods of system restore have more or less limitations and new way has made great progress.
WARNING!! This command can produce to crash the unix system where you execute it. What this command do is to generate a lot of threads (so in practice -> process) until the system is overloaded, and to recover it, it is needed a reboot of the machine.
I believe it is interesting to study how this command works, however It is important to notice that executing this, the system is going to crash, so PLEASE save all the work you have opened before. Maybe it can also corrupt the system...
This is a fork bomb.
More info: http://en.wikipedia.org/wiki/Fork_bomb
My netcat (nc-1.84-10.fc6) doesn't have the -e option, so I have to do it like this. Of course, instead of bash, you can use any executable, including scripts.
this is the most scary command that exists. read the hdparm man page. and see this post: http://dazzle.cs.mcgill.ca/wordpress/?p=36
Better don't run this command. Only funny on machines you'd like to kill.
This is a simple BASH script which with gather basic system hardware such as CPU sockets and cores, Memory modules and sizes as well as overall memory and more.
Root access may be needed to pull information from 'dmidecode'
Judging by the quality of suggestions lately I thought I'd better join in
This will launch a listener on the machine that will wait for a connection on port 1234. When you connect from a remote machine with something like :
nc 192.168.0.1 1234
You will have console access to the machine through bash.
creates a large number of processes very quickly in order to overload an OS
to stop this bomb in about 45 sec.
Type: while (sleep 100 &!) do; done
or do a killall
This will completely erase everything on your hard drive and is not reversible.