A Common Man in India

Linux Loves me..

valluryphani — Thu, 28 Jan 2010 16:32:53 +0000

Always have a strong passion towards a technology,., soon the technology likes u.. :) Believe me.. Linux loves me :) :) Ever!!
Thank you all :)

happy pongal :)

valluryphani — Thu, 14 Jan 2010 01:43:40 +0000

On this Makar Sankranti, Sweet surprises, Rays of Joys, so much Fun and a Grand Celebration to you all!

Happy sankranthi

Somethings in life… ( inspired from the blog I admire )

valluryphani — Sun, 10 Jan 2010 11:04:05 +0000

- a brand new Bike for myself – Rs 50000

- Training for Linux Kernel Programming Courseware – Rs 11000

- Taking my dad for a ride on new bike; And me remembering the days when I was standing on my dad’s LML Vespa; Priceless

Thanks to the blog for which I took this concept ! I felt very happy remembering all these when I was reading that article. :)

Quick Command

valluryphani — Mon, 28 Dec 2009 09:04:37 +0000

Strace
is a system call monitor command and provides information about system calls made by an application, including the call arguments and return value.

use strace to know what a command does internally !!

Separating Implementation from Interface

valluryphani — Thu, 10 Dec 2009 09:11:10 +0000

I have started with learning adventures of C++, In addition to that I came with learning a new concept of separating interface and implementation. Though an old topic, but thought of posting it doing at Unix.

Normally we code in a single file for everything, for example consider GradeBook example, we do declare a class, its methods and main() in a single file.

If we take a deeper look into these; Class file is the interface and main() method gives the implementation. So dividing this class and main into two separate files is the concept behind this, thus easing the programmer!

So by doing this we will have 4 files for the GradeBook example;

“GradeBook.h” –> which defines the class and its methods involved

“GradeBook.cpp” –> implementation of the methods;

“main_prog.cpp” –> interface for the programmer.

So in linux, you can now compile the program as

g++ main_prog.cpp GradeBook.cpp

Thats it, from now change the style of Code.. :)

From my Pages

valluryphani — Tue, 01 Dec 2009 11:49:41 +0000

It has been a long time since I made a blog here. Experiencing Learning at ahmedabad for 40 days and back to my civilization, It has been very good with lot of beautiful memories stored inside the box. Initially my training went with a low pace. The irony in training was they were not sure about what they are expecting from me ! Is that they want to test my programming skills ? or my testing skills? The answer is what I could not get even ! Hope my previous batches would atleast have a clarity in what they are doing. Apart from technical sessions, life skills sessions were the best part for many, improving a lot of confidence and self esteem. Facilitators were excellent to say in doing this job :) Hope I am not reviewing training there, rather just throwing my experience to my blog!!
Anyhow, everything in history is sweet :) Lets hope for the best being with the technologies of james gosling further in training :D

Learn Linux, Share Linux ;)

Setting priority to tasks in Ubuntu / Linux

valluryphani — Fri, 24 Jul 2009 06:13:30 +0000

Giving priorities to a task in Ubuntu/Linux

Using “nice” command.
-10 is highest priority
+9 is the lowest priority
0 is the normal priory at which all your tasks will be running; system level tasks run at high priority such as -5
Eg:
nice -n -4 ffmpeg_audio -ss $start_time -t $duration -i $infile -vn -acodec libfaac -ar $SAMPLINGRATE -ab $ABITRATE -ac $CHANNELS -f adts -y ->audiofifo${core} &
Learn Linux, Share Linux ;)

“|” unrecognised error with QProcess in Qt – Solved

valluryphani — Wed, 08 Jul 2009 08:50:35 +0000

In Qt, QProcess does not recognise the “|” ( pipe ) symbol when the
process is started. We can solve this by doing like this in linux.
In windows, i am sorry i do not have an answer.
Before starting the QProcess ( say for example proc ) ;
proc->start(“your process name here”), open a file and send the
whole command string to that file ( for example open a file called cmd.sh
and send the command string to cmd.sh) and then start your process as
proc->start(“bash cmd.sh”). This will not produce an error “|” unrecognised
and complete the process because it is a shell script.

*( Normally we use system when | does not work with QProcess, but the problem
here is using system, we can not connect a slot for ProgressBar or Progress-
Bar dialog. So by doing running the process as a script now we can connect
the slot of progress bar. :-) ).

** If any better solutions than the above, please mail to ramvvs@gmail.com.

Vim – auto-completion feature

valluryphani — Tue, 07 Jul 2009 06:38:05 +0000

For all the C programmers using vim – editor,
On highlight syntax using the command ” :syntax on “.

and also auto-completion can be found using “ctags”. ubuntu users can install it using the command ” sudo apt-get install ctags”.

and while programming, type “Ctrl+N” to on the auto-completion where ever it is necessary. :)

Happy Programming.
Learn Linux, Share Linux :)

Everything about “Makefile”

valluryphani — Tue, 16 Jun 2009 05:55:54 +0000

A good article on makefile HowTo’s

http://www.d.umn.edu/~gshute/make/home.html

Learn Linux, Share Linux :)