Saturday, May 23, 2009

Reboot Linux System Command

How do I reboot my Linux system? How do I reboot remote Linux system?

Linux comes with various utilities that allow a system administrator to reboot, halt or poweroff the system.

Reboot Linux command

You must login as root to reboot the system. Open the terminal and type any one of the following command to reboot the system (following is immediate reboot):
# /sbin/reboot

# /sbin/shutdown -r now

You can also use sudo command under Ubuntu Linux:
$ sudo reboot

It is a good idea to provide notification to all logged-in usersthat the system is going down and, within the last five minutes of TIME, new logins are prevented. Type the following command:
# shutdown -r +5

Sample output:
Broadcast message from vivek@cluster.orarac1.nixcraft.com
        (/dev/pts/1) at 13:21 ...

The system is going down for reboot in 5 minutes!

TIME may have different formats, the most common is simply the word now which will bring the system down immediately. Other valid formats are +m, where m is the number of minutes to wait until shutting down and hh:mm which specifies the time on the 24hr clock.

Wednesday, May 20, 2009

View Windows Services From Command Line

In a command prompt run:
tasklist /svc
This will display Image Name, PID and Services.

Friday, May 15, 2009

Darwin Streaming Server - streaming 3GP, QuickTime and MPEG-4 for Mobile Devices

Darwin Streaming Server (DSS), is the first open sourced RTP/RTSP streaming server. It was released March 16, 1999 and is a fully featured RTSP/RTP media streaming server capable of streaming a variety of media types including H.264/MPEG-4 AVC, MPEG-4 Part 2 and 3GP.

Developed by Apple, it is the open source equivalent of QuickTime Streaming Server, and is based on its code.

The initial DSS source code release compiled only on Mac OS X, but external developers quickly ported the code to Linux, FreeBSD, Solaris[1], Tru64 Unix, Mac OS 9 and Windows.

Source code is available as a release download or as development code via CVS.

Akamai uses DSS, exclusively, for streaming QuickTime and MPEG-4 content. The mobile version of the video sharing site YouTube uses DSS to stream its mobile videos in 3GP format using the H.263/AMR codec.

While sharing the same code base as QuickTime Streaming Server, Darwin Streaming Server is an open source project intended for developers who need to stream QuickTime and MPEG-4 media on alternative platforms such as Windows, Linux, and Solaris, or those developers who need to extend and/or modify the existing streaming server code to fit their needs. Darwin Streaming Server is only supported by the open source community and is not eligible for technical support from Apple. Apple hosts a number of email discussion lists for Darwin Streaming Server users and developers to share ideas and discuss deployment scenarios.

QuickTime Streaming Server (QTSS) is Apple’s commercial streaming server delivered as part of Mac OS X Server. QTSS provides users with enhanced administration and media management tools as a result of the tight integration with Mac OS X Server; these tools are not available as part of the open source project. Technical support is available for QTSS as part of the AppleCare support plans provided for Mac OS X Server and Xserve.

Both DSS and QTSS are built on a core server that provides state of the art quality of service features with Skip protection and Instant-On, and support for the latest digital media standards, MPEG-4 and 3GPP.

Darwin Streaming Server is available as a free download under the Apple Public Source License.

Wednesday, May 13, 2009

BackTrack: Pyrit demonstration (GPU cracking video)

Pyrit takes a step ahead in attacking WPA-PSK and WPA2-PSK, the protocols that protect today's public WIFI-airspace. Pyrit's implementation allows to create massive databases, pre-computing part of the WPA/WPA2-PSK authentication phase in a space-time-tradeoff. The performance gain for real-world-attacks is in the range of three orders of magnitude which urges for re-consideration of the protocol's security. Exploiting the computational power of Many-Core- and other platforms through ATI-Stream, Nvidia CUDA, OpenCL and VIA Padlock, it is currently by far the most powerful attack against one of the world's most used security-protocols. For more background see this article on the project's blog.

In this video, PureH@te Short demos the passthrough option of pyrit which eliminates the need for giant tables taking up all your hard drive space.

How To Use Backtrack Security Software: Video

Tuesday, May 12, 2009

Intro to the AirPcap USB adapter, Wireshark, and using Cain to crack WEP

This video is an introduction to the AirPcap USB adapter, and auditing WiFi networks with it.