Google Buzz

“ Atwittergain as per my trend of being late into things, I am here to offer, what I think would be a comparison comment over the dark horse Google Buzz and well adored one Twitter. Google Buzz has really amazed many of us and seems to be filling the gap, Google tried to fit on many times, but failed. A service that didn’t created a stir like Google wave did for many months, but as of now, it really seems that Google finally got something, which it was lacking since long. “


Google Buzz:buzz Launched by Google on 9th February 2010, in many ways, is the boldest attempt from Google to get hold on Social Networking without compromising its ways of making things. Orkut and OpenSocial were already there and were effective due to their inherited simplicity, but still Google lacked that bigger media presence and fanatics, Facebook or Twitter has. We were encountering lots of Facebook and TweetThis button on blogs, but still from Google side, we had only few options like to add the feed to Google reader or the recent one a bookmark to share something on Orkut. Does that work?

Buzz is a stream of status updates, pictures, links, and videos from your friends. You can “like” these items and you can comment on them. And if you use Flickr, Picasa, Google Reader, or Twitter, you can also automatically have those items imported into your stream. And Buzz will recommend items you might like based on your friends’ activity. Much like Friendfeed (launched by Google earlier) na !!!! But its integration with Gmail has made it the biggest phenomenon happening around as it started with an already existing massive base of Gmail users (150 million or 15 Carore as per August 2009).


twitter-logo Twitter: Since its creation in 2006 by Jack Dorsey, Twitter has gained notability and popularity worldwide. It is sometimes described as "SMS of the Internet" The use of Twitter’s application programming interface for sending and receiving text messages by other applications often eclipses direct use of Twitter. It has almost every biggest celebrity already on it and if we talk about numbers, then it has total 5.36 Carore users as of now (note that these are number for the ones with public profiles only)

Twitter is a free social networking and microblogging service that enables its users to send and read messages known as tweets. Tweets are text-based posts of up to 140 characters displayed on the author’s profile page and delivered to the author’s subscribers who are known as followers. Senders can restrict delivery to those in their circle of friends or, by default, allow open access. Ever since late 2009, users can follow lists of authors instead of following individual authors. All users can send and receive tweets via the Twitter website, Short Message Service (SMS) or external applications.


First of all, why social networking sites becoming so relevant?

Although I might be miserable while understanding the trend, as far I think the biggest reason behind success is,  it unites people withsocial_networking_sites1 similar lifestyles (or wanna be similar) together in the “university lifestyle”, someone can connect with a friend, view his/her pictures and there is a good chance that he/she will see their new friend the next day on campus or at the pub.  Many times these sites are not actually about the persons themselves, but about the things happening. You could get to know insides about a lifestyle, you always dreamed of, without even knowing the person having the same. Its not just about fun and time killing, but about feeling alive and talking to people in real than going to office and coming back from office in a routine, where we don’t even know our neighbors

In the similar way, it’s a medium where at least you could approach or get approached by people, you never seen or cant even think about meeting like someone layman like me wanna to give a message to SRK. Definitely, Social Sites have a reason to get popular.

How Twitter became such a big thing everyone is talking about?

twitter_bird_follow_me_big Earlier experts denied growth of Social Networking sites and later suspicious about Twitter, but it was all about simplicity. Facebook, MySpace, Orkut etc. create an almost living life online with an introduction, photos, conversations, friend circle and communities. But while in start, there is hassle of filling forms and thinking that what to tell the world about you, later on, in stressed life, it becomes a bigger and boring thing than you actually wanted.

Think, if you are feeling something very ordinary, special or just weird and wanted to tell everyone about, what you do? Mailing are old fashioned for these kind of things and if you are regularly sending such messages then likely to be missed. So what are the other options? Before twitter, there were basically four ways to do the same:

  • Send SMS to all your contacts (Its costly and embarrassing, if no one cares)
  • Change your Orkut/ Facebook/ MySpace status message (was a better and still relevant option as you wished to address friends)
  • Write a blog post (if you are not popular then nobody would even know about that)
  • Change your status in chats (Gtalk, Yahoo, MSN etc)

Twitter become just a solution from combination for all these things. It was kind of Internet SMS considering the limitation of words to express. It was not FaceBook or Orkut kind of .. it was not blogging, but was both of these thing for people having short time specially like celebrities. Moreover, concept of following someone on twitter was way different than accepting friend requests. Yes! now you were not able to distinguish between friends that whom to show photos and whom to not, but still it was solving purpose for many.

As suited and joined by Celebrities actively, it was bound to attract others due to its simplicity and once twitter clients arrived allowing you to tweet from cell over GPRS, it became a BANG.


Why am I excited about Buzz?

Seriously speaking, I been a fan boy for Google Services, due to their integration into each other and top of that simplicity in way only they Social Networking Image could have defined. Some of their product might not have gone for that much success, which they are used to, but the concept behind each of their product was never the bad one or threatening to other existing models. If you launch something exactly similar to others and advertise it so big that its the better then you are threatening, but if you made something, which actually raises standards and in place of putting points on board, then what you do look like you are doing for mass, for betterment of technology and living. This is what I feel about the way Google does things.

Still I will be critical about analyzing Buzz. Buzz is still as for me, is the kind of thing Orkut has in form of Friend Updates or kind of thing Facebook has (already they did a little over or it and Farmville, Mafia Wars like games had completely spoiled the meaning of it).


As I come to read few deeper articles about it, I find clear and bigger differences.

Google Buzz

Twitter

My Comment

Its about conversations. Someone buzz about something and other might wanna comment on the same. It creates a conversation.

Its kind of self centric, where you write your opinion or give voices to others opinion. Not necessarily, you reply to someone specifically, but write your own words for public. Its not like one-to-one conversations, but might be like conversation in some group discussion or kind of board meeting.

Both are special at their places. Twitter still relevant as its user base already self centric in the way twitter defines it. Chain of conversations are best thing that could happen to any blog/  micro-blog/ social networking and Google Buzz is headed in the same way, original Social Networking was all about, but still I doubt that how it will look like on a massive scale.

From the first hour it arrived, it started growing than any other could have, due to already established massive base of kind of most favourite email service Gmail.

It was new in its concept and since its arrival in 2006, it grwon on its own due to its uniqueness easiness and yet effectiveness.

Numbers and growth rate might say something else, but still Twitter is a steady thing. Buzz looks promising and good thing till we keep it out of context with twitter, but when will come on same scale, then they are going to carry two different definitions.

Its still inside your Gmail inbox, no separate site or link (though Google Profile is a richer version of personal pages now). Although it has been integrated into Google Maps for mobile, but still mobile client needs to be developed. Moreover, I don’t know if its possible to buzz from SMS.

Its a separate service, separate account, separate password to remember, separate website to login into. Still it has massive reach due to mobile clients developed for it. More of it, it’s available by SMS (charges apply).

Google Buzz has potential and Google is responding well to complaints to shape it better, hope people around world will raise all the points in tme. Sure, soon we will see clients developed and some way around SMS as Google SMS already available in some of the countries. Still I don’t think Google will step in something costing to users other than data usages. Its a wait and watch.

Like Wave, Buzz has many richer multimedia options starting from pics, videos to maps and docs. Thanks to integration of Google Services under one account name. There seems to be no limit over number of words in a message.

Twitter work over links and text. Although I have seen things about pics and videos but all from other sites. Maintaining too much content on different places is a hassle. There is a limit over the number of words entered in a tweet

Multimedia may make things complex and twitter succeeded on simplicity. Options are plenty, but it will be needed to be observed that how all things take shape on broader scale. Limit on number of words, keep it light weighted and straight without making confusions, while sometimes, one feel constrained due to limit, differnt perspectives.

Success of buzz lying in the way its bringing  users buzzing while they don’t even know that they are buzzing. Whole new generation, who avoided twitter thinking that why to hit upon another piece of web, when already into many. It will bring simplicity to many users as Gmail is already the one site they open on first.

Strength of Twitter is in the fact that it stands on its own without any huge thing backing it up, but the same might be weakness as well. For many things, it depends on others and its services has been down this many times that we see some sites like http://istwitterdown.com/ to check the status.

Definitely, the power of Google cant be ignored, neither could the fear among communities, who suspects that are we going to get another Microsoft? Still Google sure has the potential of handling much more heavier traffic successfully than Twitter could ever did. On the other side, Buzz has taken it from other end, it has to be seen that how people respond to it.

Many started talking about privacy violation once it was launched, Google tried to handle things quickly, but sure it highlighted that keeping everything on place could be potentially dangerous. Yes! I have to mention that there is option to opt out Buzz anytime.

Twitter has been a separate thing for everyone. You get an account in name as you want. Its integrated with services like LinkedIn on user’s choice, but still its separated from other services, which keeps it away from being a single point of failure.

Both the sides are right in their sense, but if we foresee the future, then Google is clearly working out everything with keeping the model of future’s cloud computing model in the mind. Yes!! Single account meant to be single point of failure and so more secured services and aware users are required, but same is for Cloud Computing, which is a must in next days.

Google must learn or might have already learned that this is not the good things and good technology that make things work for mass, but its lies in usability, reach and yet flexibility for everyone’s need. Many live in present only.

Lots to say, much could be said about … but what makes me excited about Buzz is that it made some of the people go live, who were still holding themselves from opening up. Yes!!! some may cry for privacy, but many of us out here want an open world and still if you want to be private then there are always options. Moreover, except the misfire of email exposing problem in start, Buzz is bringing only public contents, which will lessen the efforts of publicizing something.


At the end,  I wish to add whatever the response of others might be, I already started enjoying Buzz and pretty sure that its gonna to stay for long (As Wave, Friendfeed and OpenSocial doesn’t seem to be).

Internet Explorer 6: End of An Era

So, here comes the end of an era …

I was already wondering that how some of the old things we grown up with (even after introduction of many new alternatives) just don’t die. Like Windows XP! do we really had found any real alternative for the same, when the date of support expiration is already near? Now its turn of IE6 to go officially. Thanks for the pics Devilsworkshop

Google just announced that some of features in Google Docs and many other Google Sites and Services wont be available google_dumps_IEover Internet Explorer 6 and it made a big buzz across the blogs that Google made the final push to let this browser die, which still was holding more market share than chrome, IE7 or IE8, around 21% till the last December 2009.

Sure the link goes to the recent hacking incident, which was officially done with exploiting flaws in IE6, for which Microsoft later on released security fixes as well. Still many security experts and companies taken stand against Internet Explorer 6. German Government even issued advice to all of its citizens for not using any version of Internet Explorer including even the recent one Internet Explorer 8.  

Is it really so that only that hacking incident made IE6 pushed away? I don’t think so. Introduction of HTML5 has already pushed IE6 to become obsolete as Internet Explorer till its version 7 didn’t supported HTML5 and like Google sites, many of leading sites have already moved over HTML5 due to availability of wide range of more options. Like Google Gears, many of the services already started mentioning that you can’t use them from IE6. Its just this, Google Docs have became of huge importance in world of cloud computing and by ruling out IE6 shares in it, Google has made it somewhat helpless by now (very few can keep and actively use multiple web browsers).


Internet Explorer 6 was released on August 27, 2001, a few months before Windows XP. This version included DHTML enhancements, content restricted inline frames, and partial support of CSS level 1, DOM level 1 and SMIL 2.0. The MSXML engine was also updated to version 3.0. Other new features included a new version of the Internet Explorer Administration Kit (IEAK), Media bar, Windows Messenger integration, fault collection, automatic image resizing, P3P, and a new look-and-feel that was in line with the Luna visual style of Windows XP, when used in Windows XP. Internet Explorer 6.0 SP1 offered several security enhancements and coincided with XP SP1 patch release. In 2002, the Gopher protocol was disabled and support for it was dropped in Internet Explorer 7. Internet Explorer 6.0 SV1 came out August 6, 2004 for Windows XP SP2 and offered various security enhancements and new color buttons on the user interface. IE6 updated the original ‘blue e’ logo to a lighter blue and more 3D look.


The biggest reason behind the success of Internet Explorer 6, it was shipped with kind of most successful operating system till now, so if the OS was a hit, so was the perfectly working browser Internet Explorer 6. Later as tabbed browsing became more successful and people started shifting to firefox more, Microsoft pushed Internet Explorer 7 with their Windows Vista, but many experienced it slower than even IE6 and was not that well received. Microsoft still hoping the best to get its shares back with a much better Internet Explorer 8.

I expect more services to come forward to drop support with Internet Explorer 6 in next few days as few already done the same from behind silently. As I read in Devilsworkshop.org as well, is Gmail going to drop support for IE6 in next?

 

Apple iPad: Are we really running?

Earlier I was reading just too much about iPhone and now this iPad ….apple

As I commented on twitter, sometimes I feel that whole world is divided into two parts; people who have iPhone and people, who haven’t. Yes, I do hear many interesting things and apps about iPhone and they are sure worthy, but still I was never convinced that I should drop my old Nokia Smartphones and choose to buy an iPhone. It might be that worth for a new buy, but if you already own a satisfactory one, then I was never convinced to spend again.

Now, after really too much hype, we finally got the announcement about iPad, Apple’s tablet. I went through specifications and frankly speaking, I have found no reason to buy it till now at least. One could buy a low cost laptop or netbook, but why this? Is it doing anything new, which we were not able to do earlier? Is it offering something better than the others?

Here are some nice videos filming imaginary Hitler counting the limitations and shortcomings of iPad. Enjoy the videos (last one is perfect) and think before rushing for this 25k expense ….

 

 

 

Zabbix: Really frustrating me now

I wrote about Zabbix Installation for Layman sometimes back and really recommended itzabbix1_thumb_thumb for all system administrators out there, due to its simplicity, flexibility and promising nature about lots of aspects.

But now days, look like myself in deep troubles with the same. I am getting strange kind of problems with well established setups of Zabbix, when no one has altered any kind of configuration that is really very very strange. May be my knowledge about this product is lesser; may be reason is just that I am unable to find any proper book over it; may be the manual itself is one of worse, one could come across. Reason might be any of them or all of them, but its getting really unstable for me. It works perfectly after installation for sometime, but gets unstable soon as data grows. I am just finding one different thing in my environment that our servers run 9 AM-9PM, not 24 hours, but this should be the reason for any standard product. Or it might be something happened behind my back, when I was on leave for 3-4 days. Whatever the reasons might be, I am not able to trace it until now.


Listing here some of the issues I am facing with it, which are yet unexplained/ unresolved:



Problem 1: High Dependency on Local Time :- The first problem, I faced with Zabbix was, its going completely out of tune if somehow local time of the server get altered by any means. I tried even network time, but just of no use. You are left to pray about this only. Its been an issue since long and I have seen warnings about it manuals and books.

I really think that it should have been fixed till now (means some kind of automatic handling or making server time synced with clients etc). If you were offering this solution to corporate as along this ‘bug’ makes it completely unreliable.


Problem 2: Broken graphs later on as Data increases :- I am really not sure about this problem, but its making me low on confidence in front of management about this product. I am getting really many strange scenarios with it. The biggest Zabbix Server of mine was taking care of around 25-30 servers and this was going awry again and again. Like I am getting data in latest data tab correctly, I am getting data in 4 hours and 8 hours graphs correctly, but getting no graphs in 1 hour and 2 hours graphs, while its showing data but no lines on graph.

Searching through forums say that it might due to much data in MySQL tables and MySQL might be needed to be retuned. But I don’t think that such an application would not be able to handle a mere 2 dozen servers for even straight 7 days. No disk space issue (100 GB free), No Memory Issue (1 GB RAM), processor is Core 2 Duo, have enabled house cleanup, have increased the memory limits, but still….


Problem 3: No support as I am unable to find any person, who knows this software a bit more. Look like most of the people using more worse NagiOS only. Professionals require contract for support and forums are not that useful as its not a simple piece of application and problems are of diverse nature… literally too many. Logs are confusing and most of the time not that much info even on setting it on debug mode.



My aim of this post is not to criticize Zabbix itself here, but its support is really poor and many things not that explained in forums and manuals. Much hard to find anyone, who knows it through.

Currently looking for someone, who might be dealing with Zabbix in his environment and could offer help out of the way. I want to invite all who know a thing or two about Zabbix to share the knowledge with me and same will be with myself.

photo of Nitish KumarNitish Kumar

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Squid Proxy Server: Step by Step Dummies Manual

As promised to myself, I have updated Squid Proxy Server Implementation Manual with use cases and recommendations. Also, the related two articles has been removed and merged into the single link for avoiding ambiguity.

This also involves basic firewall and normal issues/ requirements like Outlook etc. I hope, it would be helpful for many people out there. Post your opinions and suggestions for sure.

Google Vs China, Strategy or Real Concerns?

It seems that like the last year went, Google still keeping itself well in news.

| Got to read one tweet @ claymillThe Google /China incident feels ominously profound; it’s an ending and a beginning but nobody knows exactly what ended or began.” |


logo_plain

Google; A name always found in support of Open Internet and even recently made a precise statement over definition of Open and has a philosophy that believe that “open systems win”. They lead to more innovation, value, and freedom of choice for consumers, and a vibrant, profitable, and competitive ecosystem for businesses. china

China; A nation, who leads in methods of censorship. Internet censorship in China is conducted under a wide variety of laws and administrative regulations. In accordance with these laws, more than sixty Internet regulations have been made by the People’s Republic of China (PRC) government, and censorship systems are vigorously implemented by provincial branches of state-owned ISPs, business companies, and organizations.


Internet Censorship and Google: The History

google-chinaFor the first time, Google found to have started to censor its search results in 2002 in compliance with United States’ DMCA legislation. Although even in that time, this move was taken in innovative ways as banned results were replaced by corresponding DMCA complaint. Later on the similar phenomenon was noticed with other countries like United Kingdom (Since September 2006), Germany & France (Since October 2002) and most importantly with China (Since December 2005) in adherence with their corresponding country policies.

With China, Google’s journey been with troubles since the beginning due to huge difference in philosophy. In fact, there was a time when popular search engines such as Altavista, Yahoo!, and Google were completely banned from use in China, although later the ban was lifted, but filtering remained continued.

Google officially announced its adherence with China’s policy in January 2006 and launched a Chinese-language service that will be stripped of content deemed offensive or subversive. Google somehow managed to devise an interesting solution (must read link) for this technically big problem. Later on other Internet giants including Yahoo and Microsoft’s MSN have also censored material "in exchange" for being allowed to tap a market comprising 110 million Internet users, the world’s second-largest market.


An Example of Censorship could be cited as below:

human-rights-china

human-rights-china-china


Amnesty International and Human Rights Watch strongly condemned Google’s compliance with China’s Golden Shield Project, calling it a form of self-censorship. According to Amnesty,

“ These forms of censorships seem to contradict the very principles that Google — whose unofficial motto is "don’t be evil" — was founded upon. Until January 2006, Google’s Support Center claimed that it "does not censor results for any search term", but removed this claim after reaching its deal with China. ”


By 12th January 2010, Google finally decided to stand against China’s Censorship

The sensational news was uncovered by Google itself by their blog post on 12th January 2010, in which they wrote that they faced a sophisticated attack in mid Dec 2009, where the hackers targeted Google’s corporate infrastructure originating from China that resulted in the theft of intellectual property from Google. Google claimed that a primary goal of the attackers was accessing the Gmail accounts of Chinese human rights activists.

Google said

We launched Google.cn in January 2006 in the belief that the benefits of increased access to information for people in China and a more open Internet outweighed our discomfort in agreeing to censor some results. At the time we made clear that "we will carefully monitor conditions in China, including new laws and other restrictions on our services. If we determine that we are unable to achieve the objectives outlined we will not hesitate to reconsider our approach to China."

These attacks and the surveillance they have uncovered–combined with the attempts over the past year to further limit free speech on the web–have led us to conclude that we should review the feasibility of our business operations in China. We have decided we are no longer willing to continue censoring our results on Google.cn, and so over the next few weeks we will be discussing with the Chinese government the basis on which we could operate an unfiltered search engine within the law, if at all. We recognize that this may well mean having to shut down Google.cn, and potentially our offices in China.


After attacks over RockYou and Twitter, this was a news which would have caused a stir among people for security concerns of cloud with headlines like “Now even Google got compromised”, like one tweet @vicsingh said “google has balls for potential china pullout, but the positive externality is that no one is talking about the vulnerability of their cloud”, but the matter went much more twisted and interesting as Google shared this information with the world saying …

“We have taken the unusual step of sharing information about these attacks with a broad audience not just because of the security and human rights implications of what we have unearthed, but also because this information goes to the heart of a much bigger global debate about freedom of speech.”

BoyThinking More interesting were their next two decisions;

  1. One was a somewhat not that noticed move by Google after around 6 hours of their blog post about attacks, where they made their Gmail and other services using https access by default.
  2. The other one came with the same blog post itself saying “We have decided we are no longer willing to continue censoring our results on Google.cn”


Why Google suddenly became ready to even leave China?

googlechina5-420x0

As per information revealed by Google itself, the attack was mere phishing attacks “These accounts have not been accessed through any security breach at Google, but most likely via phishing scams or malware placed on the users’ computers.

Now, the million dollars question to be asked is, such attacks been common to whole community of internet users and all leading companies since decades and Google itself said (if true) that only two of the accounts were compromised up to an extent (not even completely) then what became the reason of this huge decision, which could impact many things all around the globe in many ways?


questionIts true that for years, Google faced withering criticism for what activists and lawmakers said was a willingness to abandon social responsibility in return for greater wealth. Its true that Google co-founder Sergey Brin shared many of the critics’ concerns about Google’s presence in China (but he publicly maintained that even a censored version of the company’s search engine was better than none at all). Its also true that recent move invited world wide praises for Google.

But still it will be a question to ask that why now after four years? Is the biggest market (around 20% of whole world) became less lucrative suddenly for which many compromises were made? Is performance troubles due to excessive filtering seems to nail down Google’s cloud strategies?

Note that even now  Google is filtering its search results and its operation in China is under a review as per Google itself, not opted out. Google officials said that they will be discussing with the Chinese government the basis on which they could operate an unfiltered search engine within the law, if at all. So, wait and watch.


This link sites Testimony of Google Inc. about China from their blog post in 2006. Have a read. I would also like to invite you all to comment upon what you think about this news.

Zabbix Server: Some issues and some tips

In addition to the implementation details, I wrote few days back, I would like the add up some precautions and resolution to some issues, which would sure make life with Zabbix little easier for newbie .


Keep the date time configuration correct: I really faced much trouble over this one. Before installation of any new server, make sure that you have chosen correct Timezone settings. For most of the version of Linux, you need to type setup on console and then go to timezone configuration and set as per yours (e.g. Asia/Kolkata) and then make the same entry in /etc/php.ini for variable date.timezone as well (e.g. data.timezone=Asia/Kolkata).

This is really an irritating bug at Zabbix side as client and server both the sides should use Server Timezone entry. But its not resolved till now and might be reason for trouble to many.

Problem I faced with it: I went really a lot of trouble with time settings with one of my zabbix servers. While all others were working fine, one was not giving any data on graphs. Although resolution worked in some other way, but I would like to give a few basics —

1. Verify all the settings like agents are referencing the right server or not

2. Check that whether ports are open or not.

The Server listens on 10051 and client listens on 10050. Now, How to Check open Ports in Linux? Although there are many ways to do the same, but simpler is using netstat

# netstat –ntulp

It will show all open ports and also that which process is using them. You must find 10051 port opened on Server.

3. Check the latest data under monitoring tab (My case) This provides you info about clients that when you last moment received data from them and what data. In my case, I found that my clients received data in future time that’s why there was nothing on the graph as it was checking data in past time.

I struggled a lot, but found only one solution that was to delete all the clients from Zabbix and then import the same configuration again. When you delete one host, then it delete all the logs related to it and that’s why when you re-import the configuration then it will start-a-fresh. Thats why I insist on making a backup of all configuration once, coz after then for recreating whole thing, you need just an import and then recreating screens. 🙂


Increase the upload size in php.ini: For using the above feature, its a necessary step as  many times the size of xml file might exceed the default 2mb. Find the maximum_upload_size and increase to be at least 8mb from 2mb (default).


Copying Configuration is better in place of creating new: For Linux Servers, copy all the  configurations/ items/ graphs etc from the Linux Based Zabbix Server itself, while for Windows, you need to configure one first and then copying all the entry to other in similar manner as was in Linux Servers.


Replace CPU Utilization Screen with Memory Utilization: Although it depends on your requirements, but for me in general, its better to replace CPU Utilization screen with a custom made Memory Utilization screen made of items Total Memory and Free Memory as CPU Load data is sufficient to monitor CPU Health in most of the cases.


Make a configuration backup once you are done with adding your servers: This is the most important thing as it helps you out in quickly restoring the things, if want to migrate the whole thing to new server in case of any problem in original server. You need to use Export feature of existing server to export a xml file (might be >2 mb) and then import it once you done with installing a fresh server or existing server. Then you will be needed to change the Server IP in all client’s zabbix agent configurations (/etc/zabbix/zabbix_agentd.conf in Linux and c:\program files\zabbix agent\zabbix_agentd.conf in windows) and restarted their zabbix services.

Create a slideshow for all the servers: This is a feature, which makes it look more cool. Create a slideshow of all the screens, you create and it will keep it changing in specified time duration (default is 5 secs), which is quite better, comfortable and effective than changing the screens yourself to take a look. You could make very good use of a projector with this feature 😉