My Tech notes

how to unzip .torrent files? You do not need to decompress .torrent files. The .torrent will disappear from the end of the file once the file has finished downloading onto your computer. Then you can use the file as you see fit. It may be a .mp3 file, a .zip file, etc to use bittorent, you need a client. then open the .torrent file in azureus and you will download the file that the torrent is for. the .torrent isnt the file itself, it just tells the client where to get the file. Here are some popular torrent clients for windows. Download Azureus at Azureus Azureus - now called Vuze - Bittorrent Client Requires Java for Windows; if you are first time installing http://java.com/en/download/inc/windows_new_xpi.jsp Few more popular bittorrent clients for windows http://www.utorrent.com BitTorrent | BitTorrent Check out Comparison of BitTorrent clients - from Wikipedia, the free encyclopedia BitTorrent is the name of a peer-to-peer (P2P) file distribution protocol, and is the name of a f...

SMB write performance can be increased by Tuning the buffer cache. The secret to good performance is to keep as much of the data in memory for as long as is possible. Writing to the disk is the slowest part of any filesystem. If you know that the filesystem will be heavily used, then you can tune this process for Linux Samba. writing out dirty blocks to the disk until the filesystem buffer cache is 80 percent full (80). default is 40%, source = http://tldp.org/LDP/solrhe/Securing-Optimizing-Linux-RH-Edition-v1.3/chap29sec287.html by writing echo 80 > /proc/sys/vm/dirty_ratio I am getting around 2MB increase while write operation, tested in Xp. I have tried with this single option, as the ref source is for linux 2.2 and we are using 2.6 kernel. we can try out Linux General Optimization suggested at http://tldp.org/LDP/solrhe/Securing-Optimizing-Linux-RH-Edition-v1.3/gen-optim.html Tried with smb.conf, I am getting around 1MB gain while read and write. socket options = TCP_NODELAY I...

The Advancement of technology had entered into nanometer age. search in google define:Blue-ray will get wiki pages here is summary of it. Blu-ray Disc (also known as Blu-ray or BD) is an optical disc storage medium designed to supersede the standard DVD format. Its main uses are for storing PlayStation 3 games, high-definition video, and data storage, with up to 50 GB per disc. This is quite impressive, The disc has the same physical dimensions as standard DVDs and CDs. Why Blu-ray disc stores 50GB on same size of DVD/CD? Well here is advancement of laser technology, thanks to Shuji Nakamura for his invention on blue laser, The name Blu-ray Disc derives from the blue-violet laser used to read the disc. While a standard DVD uses a 650 nanometre red laser, Blu-ray uses a shorter wavelength, a 405 nm blue-violet laser, and allows for almost six times more data storage than on a DVD. check out about Blu-ray Movies - Everything about Blu-ray movies and releases .at http://www.blu-ra...

Get HyperSCSI for SAN - Storage Area Network SCSI (Small Computer Systems Interface) family of protocols. HyperSCSI can allow one to connect to and use SCSI and SCSI-based devices (like IDE, USB, Fibre Channel) over a network as if it was directly attached locally. Why HyperSCSI over iSCSI? The main advantage of HSCSI compared to iSCSI is especially a lower network load as well as an end system (server and client) load. TCP/IP SAN performance is still not good enough without hardware acceleration FC-based SANs cannot do Storage Wide-Area Networks Fully functional software implementation of both client and server so HSCSI can be used for a solution built on commonly available hardware, no expensive and specialized hardware is needed. Therefore, HSCSI can be used for building small and cheap SANs. HSCSI main disadvantage is this protocol has no official standard like iSCSI nd so it is unsupported in any way by manufacturers developing hardware data storage solutions. Two modes of oper...

SCALA programming language and Secret behind Twitter's growth Scala is a general purpose programming language designed to express common programming patterns in a concise, elegant, and type-safe way. It smoothly integrates features of object-oriented and functional languages, enabling Java and other programmers to be more productive. Code sizes are typically reduced by a factor of two to three when compared to an equivalent Java application. http://www.scala-lang.org/ Introducing Scala Scala is a general purpose programming language designed to express common programming patterns in a concise, elegant, and type-safe way. It smoothly integrates features of object-oriented and functional languages, enabling Java and other programmers to be more productive. Code sizes are typically reduced by a factor of two to three when compared to an equivalent Java application. Programming Scala book Programming in Scala Some books A comprehensive step-by-step guide by Martin Odersky, Lex Spoon,...

How to Configure udhcpc for Setting IP netmask and Gateway? Tell udhcpc client to run on eht1 interface with -i option. Also use -s option to tell udhcpc client to use script from specified path. /sbin/udhcpc -i eth1 -p /var/run/dhcpClient-wifi.pid -s /usr/share/udhcpc-wifi/default.script & default.script directs the udhcpc to executes one by one scripts from specified folder ie /usr/share/udhcpc-wifi/ else default folder location for udhcpc script is /usr/share/udhcpc/ For directing IP address to temp file obtained using udhcpc client or for DHCP , do little modification in sample.bound file. Here is Sample udhcpc renew script, which will update the ip address, netmask and gatway obtained by boradcasting. The new values will be updataed in /var/dhcpfile. #!/bin/sh # Sample udhcpc renew script RESOLV_CONF="/etc/resolv.conf" [ -n "$broadcast" ] && BROADCAST="broadcast $broadcast" [ -n "$subnet" ] && NETMASK="netmask $subn...

How to Access NAS Box From Windows Vista Ultimate Edition? Access NAS box windows vista (Ultimate editions), If you NAS box contains SMBD/ SAMBA version less than or equals 2.2.12 Steps to access NAS box from Windows Vista Ultimate Edition 1. In the Windows taskbar, click Start and select Run. In Run window type “secpol.msc” and press OK. 2. This will open User Account control window, here click continue. 3. Now double click on the “Local Policies” and click on “Security Options”. 4. Find “Network Security: LAN Manager authentication level” in right windowpane and double click on this policy. 5. Now change Local Security Setting “Send NTLMv2 response only” to “Send LM & NTLM –use NTLMv2 session security if negotiated”. 6. click “apply” and then “OK”. Now your Vista PC ready to access the NAS box. Share your tricks also.

How to participate in the Linux kernel community? check out A GUIDE TO THE KERNEL DEVELOPMENT PROCESS Jonathan Corbet has written a very interesting article on "how to participate in the Linux kernel community" Section 1 is the executive summary. Section 2 introduces the development process, the kernel release cycle, and the mechanics of the merge window. Section 3 covers early-stage project planning, with an emphasis on involving the development community as soon as possible. Section 4 is about the coding process; several pitfalls which have been encountered by other developers are discussed. Section 5 talks about the process of posting patches for review. Section 6 covers what happens after posting patches; the job is far from done at that point. Section 7 introduces managing patches with git and reviewing patches posted by others. Section 8 concludes the document with pointers to sources for more information on kernel development. Please take a look at the complete documen...

It's just something fun to do to add eye candy to your boot-up screen, if your tired of looking at the same old LILO prompt or boot-up screen every time you start your system. Make your LILO boot screen more exciting with animated pictures! From the author's web page: Since mid-2001, most Linux distributions include some patched versions of LILO (the LInux LOader) that support VGA or VESA graphical modes and make it possible to have a nice background image while booting. Starting with SuSE Linux 7.2, the SuSE distribution includes an interesting extension to LILO that allows a programmer to define some callback functions that are triggered when some events occur (key pressed, timeout, ...). It gives a much greater flexibility than the other extensions that are provided by most of the other Linux distributions, including the new graphical modes that have recently been added to the official version of LILO 22.x. While testing the SuSE version of LILO and the helper program mkboot...

The Google Summer of Code is a program designed to encourage college student participation in open source development. How does it work ? Students submit project proposals to the organizations, organizations rank the submissions (students paired with mentor from open source community).Google allocates a given number of slots to each organization, the students work all summer on their project in close mentored collaboration with that organization. GSoC 2009 Timeline March 9-13: Google will accept applications from open source projects. March 13-17: Google program administrators review organization applications. March 18: List of accepted mentoring organizations published on code.google.com/soc/ March 23-April 3: Student applications acceptance period. March 23: Student application period opens. April 3: Student application deadline. April 20: Accepted student proposals announced at http://code.google.com/soc/ August 24: Final evaluation deadline. September 3: Students can begin submitt...

Ruby.rewrite(Ruby).In this RubyFringe talk, Reginald Braithwaite shows how to write Ruby that reads, writes, and rewrites Ruby. The demos include extending the Ruby language with conditional expressions, new forms of evaluation such as call-by-name and call-by-need, and more. RubyFringe is an avant-garde conference for developers that are excited about emerging Ruby projects and technologies. They're mounting a unique and eccentric gathering of the people and projects that are driving things forward in our community. about Author Reginald Braithwaite was the tech lead on the team that created JProbe Threadalyzer, a tool that did automatic detection of potential threading-related bugs. check out the presentation here.

Below code listing illustrates usage of execl function series, and talks about how to redirect the output from these functions. Here is trick to redirect the output from execlp command series In other words implematiation of "ls -l >/var/test.log" first open file using "open" system call #include #include #include int open(const char *pathname, int flags); then duplicate this file pointer with stdio file pointers stdio file pointer are 0 for stdin 1 for stdout and 2 for stderr use of dup2 dup and dup2 create a copy of the file descriptor oldfd. int dup2(int oldfd, int newfd); here is c example implementation in function; int spawn(char* cmd) { pid_t child_pid; int fptr,fptr2; char tmp_devfs[20]; int child_status=-1,ret=-1; // printf("executing cmd=%s\n",cmd); fptr=open("/var/test.log",O_RDWR); /*create new process */ child_pid = fork(); if (child_pid != 0){ /* This is the parent process. */ ret = c...

The official date for the launch of Firefox 3 is June 17, 2008. Join our community and this effort by pledging today . Google has updated their Firefox toolbar to make it compatible with Firefox 3 - the browser that is due tomorrow .

The Function Pointer Tutorials C Programming forum All interview.com Insight/GDB debugger for Windows on Linux Linux News group Sample questions Insight FAQ from redhat Kgdb- bug report All questions answered here

On November 5th, 2007 leading technology and wireless companies came together to announce the future development of a truly open platform for all kinds of mobile devices - Android. Leading this development are Google Inc, T-Mobile, Intel, HTC, Qualcomm, Motorola along with many other companies under the umbrella of the Open Handset Alliance - a global alliance between technology and mobile industry leaders. The Open Handset Alliance’s common goal is to foster and develop a new breed of innovation for mobile devices allowing a far better user experience than today’s current mobile platforms. The OHA will provide a far greater degree of openess that will enable developers to work and collaborate in ways never before seen, Android will greatly improve and speed up the process in which new and innovative mobile services are development and made available to the end user. http://www.talkandroid.com/