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configuration transfer over scp on commit not working on Juniper EX-2200 switch

- by liv2hak

I am making a series of configuration changes on Junos EX- 2200 switch.I have this router connected to another PC via an ethernet cable.The IP address of the switch is 192.168.1.1.I am able to ping from 192.168.1.1 to 192.168.1.0 and vice-versa. After the changes I make I do the following commands set system archival configuration transfer-on-commit set system archival configuration archive-sites "scp://[email protected]:/home/karthik/ws_karthik/sw1_config_1.txt" password godfather commit Where there is a user with user-name "karthik " and password "godfather".The path shown above also exists in the system How ever I don't see the configuration file sw1_config_1.txt created at the path specified. Also I have verified that sshd is running on the PC (192.168.1.10) Am I doing something wrong here? It would be great if anyone could help me out.

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C# RSA Cryptographic Algorithm

- by karthik

Hi, Is C# 'RSACryptoServiceProvider' cryptographic algorithm is a part of Microsoft- CryptoAPI? Any advantage we have for normal asymmetric encryption by using CryptoAPI over 'RSACryptoServiceProvider' in .Net? I cannot understand the difference between them?And which one is best and safty? Could you please help? Thanks Karthik

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Between 2 Androids and to other OS mobiles

- by Karthik Balaguru

Hi, PhoneMyPC tool in Android provides remote desktop connection to PC. But, Do Android based mobiles support VNC protocol/softwares for connection between 2 android mobiles ? Do android based mobiles support RDP or other tools for connections to other OS based mobiles like windows, symbian etc ? Thx in advans, Karthik Balaguru

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Disable Back Button (showing cached version) without JavaScript

- by vigna hari karthik

Hey Friends, I want to disable the broswer back button without using javascript. So far i have used this coding: Response.CacheControl = "no-cache" Response.CacheControl = "private" Response.CacheControl = "public" It's working fine in the internet explorer 8 but in case of mozilla fire fox it is not working.pls say same the solution to work in all browsers. Thanks in advance With Regards V.karthik

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One National Team One Event – SharePoint Saturday Kansas City

- by MOSSLover

I wasn’t expect to run an event from 1,000 miles away, but some stuff happened you know like it does and I opted in. It was really weird, because people asked why are you living in NJ and running Kansas City? I did move, but it was like my baby and Karthik didn’t have the ability to do it this year. I found it really challenging, because I could not physically be in Kansas City. At first I was freaking out and Lee Brandt, Brian Laird, and Chris Geier offered to help. Somehow I couldn’t come the day of the event. Time-wise it just didn’t work out. I could do all the leg work prior to the event, but weekends just were not good. I was going to be in DC until March or April on the weekdays, so leaving that weekend was too tough. As it worked out Lee was my eyes and ears for the venue. Brian was the sponsor and prize box coordinator if anyone needed to send items. Lee also helped Brian the day of the event move all the boxes. I did everything we could do electronically, such as get the sponsors coordinate with Michael Lotter on invoicing and getting the speakers, posting the submissions, budgeting the money, setting up a speaker dinner by phone, plus all that other stuff you do behind the scenes. Chris was there to help Lee and Brian the day of the event and help us out with the speaker dinner. Karthik finally got back from India and he was there the night before getting the folders together and the signs and stuffing it all. Jason Gallicchio also helped me out (my cohort for SPS NYC) as he did the schedule and helped with posting the speakers abstracts and so did Chris Geier by posting the bios. The lot of them enlisted a few other monkeys to help out. It was the weirdest thing I’ve ever seen, but it worked. Around 100+ attendees ended up showing and I hear it was a great event. Jason, Michael, Chris, Karthik, Brian, and Lee are not all from the same area, but they helped me out in bringing this event together. It was a national SharePoint Saturday team that brought together a specific local event for Kansas City. It’s like a metaphor for the entire SharePoint Community. We help our own kind out we don’t let me fail. I know Lee and Brian aren’t technically SharePoint People they are honorary SharePoint Community Members. Thanks everyone for the support and help in bringing this event together. Technorati Tags: SharePoint Saturday,SPS KC,SharePoint,SharePoint Saturday Kanas City,Kansas City

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How to program critical section for reader-writer systems?

- by Srinivas Nayak

Hi, Lets say, I have a reader-writer system where reader and writer are concurrently running. 'a' and 'b' are two shared variables, which are related to each other, so modification to them needs to be an atomic operation. A reader-writer system can be of the following types: rr ww r-w r-ww rr-w rr-ww where [ r : single reader rr: multiple reader w : single writer ww: multiple writer ] Now, We can have a read method for a reader and a write method for a writer as follows. I have written them system type wise. rr read_method { read a; read b; } ww write_method { lock(m); write a; write b; unlock(m); } r-w r-ww rr-w rr-ww read_method { lock(m); read a; read b; unlock(m); } write_method { lock(m); write a; write b; unlock(m); } For multiple reader system, shared variable access doesn't need to be atomic. For multiple writer system, shared variable access need to be atomic, so locked with 'm'. But, for system types 3 to 6, is my read_method and write_method correct? How can I improve? Sincerely, Srinivas Nayak

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Hosting WCF over Internet

- by karthik

I am pretty new to exposing the WCF services hosted on IIS over internet. I will be deploying a WCF service over IIS(6 or 7) and would like to expose this service over the internet. This will be hosted in a corporate network having firewall, I want this service to be accessible over the internet(should be able to pass through the firewall) I did some research on this and some of the pointers I got: 1. I could use wsHTTPBinding or nettcpbinding (the client is intended to be .net client). Which of the bindings is preferable. 2. To overcome the corporate I came across DMZ server, what is the purpose of this and do I really need to use this). 3. I will be passing some files between the client and server, and the client needs to know the progress of the processing on server and the end result. I know this is a very broad question to ask, but could anyone give me pointers where I could start on this and what approach to take for this problem. Any help will be appreciated. Thanks Karthik

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Running Apache and Tomcat together on different subdomains?

- by Ritesh M Nayak

Posted this on ServerFault but didn't get a response. Hoping I will have better luck on the Ubuntu site. I have been trying to get this working the whole of today. I have a server which resolves to the domain example.com . This is running Apache2 and Tomcat 6. The requirement is to direct requests to example.com to apache2 and app.example.com to Tomcat. I know I have to do a VirtualHost proxy pass for this to work. Here are the settings on my server. /etc/hosts file looks something like this 127.0.0.1 localhost localhost.localdomain example.com app.example.com I have two virtual host files for the different domains in /etc/apache2/sites-enabled /etc/apache2/sites-enabled/example.com looks like this <VirtualHost *:80> # Admin email, Server Name (domain name) and any aliases ServerAdmin webmaster@localhost ServerName example.com ServerAlias www.example.com DocumentRoot /var/www <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/> Options Indexes FollowSymLinks MultiViews AllowOverride None Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog /var/log/apache2/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /var/log/apache2/access.log combined Alias /doc/ "/usr/share/doc/" <Directory "/usr/share/doc/"> Options Indexes MultiViews FollowSymLinks AllowOverride None Order deny,allow Deny from all Allow from 127.0.0.0/255.0.0.0 ::1/128 </Directory> </VirtualHost> /etc/apache2/sites-enabled/app.example.com file looks like this <VirtualHost *:80> ServerName app.example.com ServerAlias www.app.example.com ProxyPreserveHost On ProxyPass / http://localhost:8080/ ProxyPassReverse / http://localhost:8080/ SetEnv force-proxy-request-1.0 1 SetEnv proxy-nokeepalive 1 </VirtualHost> mod_proxy and mod_rewrite are both enabled on the apache instance. I have a CNAME entry for both example.com and app.example.com. When accessing app.example.com, I get an 403 forbidden, saying I have no access to / on the server. What am I doing wrong?

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Fairness: Where can it be better handled?

- by Srinivas Nayak

Hi, I would like to share one of my practical experience with multiprogramming here. Yesterday I had written a multiprogram. Modifications to sharable resources were put under critical sections protected by P(mutex) and V(mutex) and those critical section code were put in a common library. The library will be used by concurrent applications (of my own). I had three applications that will use the common code from library and do their stuff independently. my library --------- work_on_shared_resource { P(mutex) get_shared_resource work_with_it V(mutex) } --------- my application ----------- application1 { *[ work_on_shared_resource do_something_else_non_ctitical ] } application2 { *[ work_on_shared_resource do_something_else_non_ctitical ] } application3 { *[ work_on_shared_resource ] } *[...] denote a loop. ------------ I had to run the applications on Linux OS. I had a thought in my mind, hanging over years, that, OS shall schedule all the processes running under him with all fairness. In other words, it will give all the processes, their pie of resource-usage equally well. When first two applications were put to work, they run perfectly well without deadlock. But when the third application started running, always the third one got the resources, but since it is not doing anything in its non-critical region, it gets the shared resource more often when other tasks are doing something else. So the other two applications were found almost totally halted. When the third application got terminated forcefully, the previous two applications resumed their work as before. I think, this is a case of starvation, first two applications had to starve. Now how can we ensure fairness? Now I started believing that OS scheduler is innocent and blind. It depends upon who won the race; he got the largest pie of CPU and resource. Shall we attempt to ensure fairness of resource users in the critical-section code in library? Or shall we leave it up to the applications to ensure fairness by being liberal, not greedy? To my knowledge, adding code to ensure fairness to the common library shall be an overwhelming task. On the other hand, believing on the applications will also never ensure 100% fairness. The application which does a very little task after working with shared resources shall win the race where as the application which does heavy processing after their work with shared resources shall always starve. What is the best practice in this case? Where we ensure fairness and how? Sincerely, Srinivas Nayak

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Sound plays from laptop speakers only even when headphones are connected

- by Ankush N Nayak

I'm using a Dell Vostro 1014 laptop with Ubuntu 11.10. From the time I had Ubuntu 9.04, sound comes from the laptop speakers only even when I plug in earphones or external speakers. Also, if an external microphone plugged in, it does not work. Dell even replaced my motherboard to check for hardware issues but the problem persists. So it is definitely not a hardware issue. The sound plays perfectly through the headphones in the pre-boot diagnostics. So I figure, this must be a problem with Ubuntu not recognizing my sound card. Please try to give a solution for this problem.

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Confused about career options in Web Developement.

- by Radheshyam Nayak

I am currently in the final year of my graduation in computer science course. I love programming in PHP but not under pressure. As my graduation life is going to be over I have to shape up my career. My personal desire is to become a web developer and start my own web-based company after completion of courses. I do not have any desire to work for a company as a developer. Currently I have programming knowledge of PHP, Mysql and Javascript. Though I have not completed any type of project in PHP. So to become a complete web developer what else do I need to know to be able to get developement project? Any project I apply for are simply declined due to lack of portfolio. So how should I proceed?

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Dual Boot Windows 8 with Ubuntu 12.10

- by karthik nayak

This is my First time so please help/ Steps I Followed : Install windows 8 pro with media centre On my asus k55vm, i7 ,8gb. windows boots fine and is in perfect condition. booted into Ubuntu live USB and installed ( it detected windows, installed alongside windows 8 with recommended setting ) installed perfectly. rebooted , but no option to select Ubuntu, just loads into windows 8 without any option, tried boot repair and no use . Please HElp , tried many tutorials to no use , heard about easybcd also , any help ?

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How can I connect to wireless network using a wireless dongle in Ubuntu 11.10?

- by Ajita Kumar Nayak

i have dual operating system xp and ubuntu 11.10 and trying to connet internet by using HSDPA 3GPP Release5 Micromax Dongle but it is working in windows xp not in ubuntu.I am unable to connect internet even i have done my edit connection and all the setting using aircel network but unable to connect internet.plz give me a sugession how could i do manually. How can I connect to wireless network using a wireless dongle in Ubuntu 11.10?

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C# Value member property repopulate or Re render the control..

- by karthik

Hi.. I just wanted to confirm couple of things. I) Code snippet: cmb1.Datasource= dt; cmb1.Valuemember = "value"; Does the control rendering happens 2 time for the control, 1 more time extra because of the value member getting changed after data source assigned. Is this so? II) How can I trace these re-populations in C#? I just wanted to debug and see and confirm? Example please? Thanks Karthik

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JQuery, ASCX and webmethods not seems to be working

- by Karthik K

Hi all, I have a cascading dropdown (3 of them) Type, Categories and Sub Categories. Type loads first and upon selection of Type, Category load and selection of Category, Sub Category loads. Also i have 2 buttons, "Add Category" and "Add Sub Category" Upon clicking on these buttons, i call a JQuery Modal Form to add them. I use Webmethod in code behind to add them to database This works perfectly in ASPX page. Since I need use this in 3-4 pages, i thought of making the above as User control (ASCX). When i try to use this in a webpage, the webmethods in ASCX don't get called. Is my approach correct? what should be done for my scenario lOoking forward for your suggestions. Thanks in advance Karthik

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C# Value member property repopulate the control..

- by karthik

Hi.. I just wanted to confirm couple of things. I) Code snippet: cmb1.Datasource= dt; cmb1.Valuemember = "value"; Here data population happens 2 time for the control, 1 More time extra,bcoz of value member getting changed after data source assigned. Is it true? II) How can I trace these re population in C#? I just wanted to debug and see and confirm? example please? Thanks Karthik

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iphone mkmapview

- by karthik

Hi, This is karthik. I am developing an app using mapview in iphone. I have to use two different pins to show user locations. That two users are different type . One user is belong to some category and another one is some other category. I have to check that category and want to plot pin depend upon that category. When I try to do that, that pin is not showing properly. For a certain category it shows another pin, not what i set there. Can anyone help me? What i need is i want to load two different pins in map depend upon some category. For example , if that category is shopping mall then i have to show building image then if there is any garden i have to show some other image at a same time not one by one . I want to plot two pins with different category at the same time. For that,what could i do? I tried lot of solution , but its not showing properly. Help me?

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I cant add PPA repositories!

- by Karthik Krishna

For example, after running this command : sudo add-apt-repository ppa:tualatrix/ppa I get the following output : Traceback (most recent call last): File "/usr/bin/add-apt-repository", line 125, in <module> ppa_info = get_ppa_info_from_lp(user, ppa_name) File "/usr/lib/python2.7/dist-packages/softwareproperties/ppa.py", line 80, in get_ppa_info_from_lp curl.perform() pycurl.error: (6, "Couldn't resolve host 'launchpad.net'") Why is it so. I just installed Ubuntu 12.04 LTS. And it works fine. I have updated and installed the system. I have even installed all required packages. But the thing is as soon as I want to install more packages, Like PPA and sort I am not able to. Till now I have not been able to install any PPA. I am working behind a proxy.

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Shortcomings of using dynamic types in C#

- by Karthik Sreenivasan

I have been recently studying more on the dynamic types in C#. With some examples I understood once the code is compiled, it does not need to be recompiled again but can be executed directly. I feel the flexibility provided by the keyword to actually be able to change data type at will is a great advantage. Question, Are there any specific shortcomings apart from wrong dynamic method calls which throw run time exceptions which developers must know before starting the implementation.

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Steam-Linux behind a proxy server

- by Karthik

I just downloaded Steam Beta from here. I installed the package, and when I start steam, I get the following It then says, unable to connect. When I start it from the terminal, I get this error. SteamUpdater: Error: Download failed: http error 407 Since I get a 407 error, it is related to Proxy Authentication. I have set up my http_proxy, ftp_proxy, https_proxy environment variables. I am behind an authenticated proxy server. How do I get Steam working from behind a proxy server?

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Being prepared for a code review as a developer?

- by Karthik Sreenivasan

I am looking for some ideas here. I read the article How should code reviews be Carried Out and Code Reviews, what are the advantages? which were very informative but I still need more clarity on the question below. My Question is, Being the target developer, can you suggest some best practices a developer can incorporate before his code is going get reviewed. Currently I practice the following methods PPT for a logical flow Detailed comments. Issue: Even though I have implemented the above practices, they do not help on the review. The problem I faced is, when certain logic is referred, I keep searching for the implementation and the flow and too much time is wasted in the process and I get on people’s nerve. I think a lot of developers would be going through what I am going through as well.

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How to emulate pressing the Close button from a script?

- by Karthik

I wanted Thunderbird to stay in the Background to notify me of incoming mails. After a bit of searching, I found this post. How to keep Thunderbird and Pidgin running on background? The solution is to install an addon so that when we close Thunderbird it just stays in the background. Now, to have thunderbird running at Start up we can just add it to Startup Applications. But, when I open my system, Thunderbird also gets opened and I have to manually press the close button everytime to make Thunderbird go into the background. The solution given in the above post for this problem is to select Minimize on start. But doing so affects the way in which Thunderbird works when invoked from the Messaging menu. So I deselected this option. But, if there is a way to emulate pressing the Close button from a script, I can just add that script to Startup Applications So is there a way to achieve this? Note : If there is a simpler way to solve my original problem of keeping Thunderbird in background please post that also. Many thanks.

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Retain only dependencies of a given package

- by Karthik

I am trying to have a minimal version of Ubuntu, having only those packages necessary to run mininet. So, I would like a solution, where I would be able to uninstall all the packages from the system, except those that are needed to run mininet. A much more preferable solution would be to be able to create a new ISO, with mininet and all it's dependencies. Is there any program out there which is already capable of this? If not please guide me on how I can solve my problem? Note: I need to retain not only the direct dependencies of mininet, but also dependencies of dependencies and so on. The final system should be able to run mininet without a hitch.

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How do I go about hosting facebook apps that are picking speed?

- by Karthik

My situation is this. I coded in php and built a facebook app. After 3 days it has 13,000 users. I have my own server at hostmonster. It is a regular plan costing me about $70 per year. It has unlimited bandwidth. I did not anticipate hosting apps or that it could pick up so many users. Already 1 Gb of data was transferred in the last few days. I am planning to build a few more apps(around 10 - 20) and reach atleast a million users in total. Should I continue hosting on the same server or move to a VPS? I am a student and I don't have too much of a disposable income. So I want to move only if it is necessary. Right now it shows 1 Gb/infinity in data transfer. Any help/suggestions highly appreciated.

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Not able to set up Gwibber Online accounts

- by Karthik

I first tried Ubuntu 12.10 from the Live USB and then eith Virtual Box. In both cases I was able to connect to my google Account from Gwibber. But now I have done a clean install, but am not able to connect at all. I get a rotating circle, which just keeps on going. I am using a proxy server whose details I have given in the Network Proxy settings. I have also set up the http_proxy, https_proxy and ftp_proxy variables.

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