Smart Shetti

2006-06-13T05:13:00.000-07:00

You can listen to any PDF instead of reading with
Adobe Reader 7 .0 Or 6.0, and the short cut is:

Ctrl+shift+b - to hear the entire Document
Ctrl+shift+v - to hear the page
Ctrl+shift+c - to pause and resume
Ctrl+shift+e - to stop

Open any PDF File and test....

2006-01-06T00:43:00.000-08:00

If you ever need to recompile your kernel!!!

do the following steps!
1. go to directory where linux source is kept
2. run make xconfig (you can also do menuconfig), and choose all that you need for the kernel
3. make clean
4. make depend
5. make bzImage (this builds the image)
6. make modules (this builds the kernel modules)
7. make modules_install(god knows)
8. cp arch/i386/boot/bzImage /boot/vmlinuz-2.2.24-new
9. cp System.map /boot/System.map-2.2.24-new
10. edit /etc/lilo.conf
add following lines
image=/boot/vmlinuz-2.2.24-new
label=linux-new
11. lilo -v

2005-11-21T19:22:00.000-08:00

Useful gvim tips

set incsearch
set ic
set ruler
set hls
set smartindent
sy on
set tags=
set cindent
set sw=4
set ts=4
set expandtab
set softtabstop=4
set guifont=-BIZNET-FotinosTypewriter-Medium-R-Normal-Sans-12-120-75-75-M-70-ISO8859-2
highlight Normal guibg=grey

Useful X specific commands

xhosts + (disables access controls)
xset -d (disables beeps)

2005-09-01T23:40:00.000-07:00

Dont know XML???

http://www.vivtek.com/xml.html
http://www.xml.com/

generate XML parser code???
link is here!!!
http://www.rpbourret.com/xml/XMLDataBinding.htm
http://sourceforge.net/projects/xmel/

here is nice faq's about XML namespaces and its myths!
http://www.rpbourret.com/xml/NamespacesFAQ.htm
http://www.rpbourret.com/xml/NamespaceMyths.htm#myth4

2005-08-30T23:43:00.000-07:00

Some APIs for bench marking performance

getrusage()
gethrtime()
gethrvtime()

The above api's might not be available in all the platforms consistently.

2005-08-17T02:37:00.000-07:00

Regular expression greps (egrep)
use egrep instead of grep

for ex:
egrep "yes|no"

will grep for occurence of lines containing "yes" or "no" in the given file.

2005-08-17T01:57:00.000-07:00

Useful GDB tutorial on process memory map etc..

memory layout and stack

definitely useful link to be read before you attend any interview or conduct an interview, esp folks who forget basics very often.

2005-08-02T23:35:00.000-07:00

Useful GDB commands

How to set display length of character buffer?
You should have noticed that whenever you try printing a big buffer, GDB will print only first few characters. This happens due to default GDB configuration, where "print elements" might have been set to 200. To change the print limit to higher value, do the following on GDB prompt.

set print elements 2000

You can also make use of show command in GDB to get all the values set for various configuration variables as follows:

show print

How to print stack information?
here is the link
example gdb commands:
info args
info locals

I shall add more GDB know-how's as I learn them

2005-08-02T23:02:00.000-07:00

Shell commands
How to extract unique line entries from a file?
cat | sort -u
This command is particularly useful where you have lots of repeating information such as IDs, URLs which appear as separate lines.

Pattern search on gvim not matching part of string?
/[^]
ex
/leaked [^0]
The above vim search will highlight the non-Zero leak occurances.

How to list contents of tar archive?
tar -tvf

2005-07-28T05:51:00.000-07:00

first blog day's learning
----------------------------
1. Why the hell pexpect (python expect) doesnt spawn my shell script?#?#?#?
let me talk first about pexpect :- This a nice python library using which you can do lots of automation kinda work. Especially if you are boared of repetitive manual testing using a console application. You can simply write a python script, which uses this library and spawn the application, feed input, expect/read output etc etc...
Also helps if you want to run load/torture tests using an application which requires console interaction.

Now let me concentrate why the shell script which I was trying to launch using pexpect's spawn() function wasnt working?
well, the script didnot have "#!/bin/bash' as first line.
Internally the execv command was having bad executable format error!!!
It required half a day to figureout the same and I had to write a C program to figure it.

Remeber one more thing:- pexpect's spawn method takes exe and it's arguments as a string. Becareful, and ensure that arguments are separated with one and only one space!
an extra space shall be treated as an additional argument and number of args passed to execv's argument array shall be higher than expected. This (not-a-)mistake might cause the program to display its usage (ie. how to use the program via command line), though you have used it correctly!!!

using pexpect you can do many cool things like automatically ftp/telnet login, without bothering to give the username/password again and again... (provided u are not bothered of password security)

2005-07-28T05:45:00.000-07:00

This blog is exclusively for folks like me (forgetful, lots of uncommonsense) :)
Most people who I see around have atleast more or less similar degree of above traits.
I shall blog the learnings which one should not forget (atleast I shouldnot) in future and shouldnt go for reinventing the wheel.
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