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SEARCH KEYWORD -- Network traffic

  Server monitoring shell scripts

There are many open source server monitoring software such as cacti and nagios. Besides these, can we write our own shell scripts to monitor them? The shell scripts written by ourselves can fulfill our special requirements better and have a more detailed coverage. Below are some commonly used shell scripts used by Evangelist, an Oracle DBA. 1. Check network gateway traffic #!/bin/bash #network #Mike.Xu while : ; do time='date +%m"-"%d" "%k":"%M' day='date +%m"-"%d' rx_before='...

   Server monitor,CPU,memory,shell     2013-08-30 21:56:14

  Taking Precautions to Avoid Shady VPN Providers

VPNs or virtual private networks are virtual tunnels that obscure your IP address, routing your internet traffic through a server located in a country of your choice, in an encrypted and anonymous way. Using a VPN allows you to: secure your sensitive data from hackers obscure the IP address so you can see content not available in your country avoid websites you routinely surf (e.g., Facebook) noticing a different IP address when you are traveling, and asking you to verify your identity bypass t...

   VPN,NETWORKING     2019-02-19 07:26:26

  SSH Security and You - /bin/false is *not* security

Backstory While at RIT around 2004 or 2005, I discovered that a few important machines at the datacenter allowed all students, faculty, and staff to authenticate against them via ssh. Everyone's shells appear to be set to /bin/false (or some derivative) on said machines, so the only thing you'll see after you authenticate is the login banner and your connection will close. I thought to myself, "Fine, no shell for me. I wonder if port forwarding works?" ...

   Linux,Security,/bin/false,SSH     2012-02-06 07:46:29

  App's user value doesn't necessarily bring business value

There is an old saying in Internet world, you can get business value as long as you can achieve user value. Is this statement outdated in mobile Internet era? This statement originated from PC Internet era, but now the time users spend on PC drops and user behavior tends to be stable and conservative. In contrast, people are more willing to stay on mobile devices. The difference between PC and mobile is that users are freely to move around on PC end. People can navigate from one link to another ...

   App,Business value,User value     2013-06-25 10:52:12

  What will happen after Baidu acquires PPS?

One month ago there was some news that Ai Qiyi would acquire PPS through Baidu Now this has been confirmed, Baidu will spend $400,000,000 on acquiring Shanghai Public Source Network Co., Ltd. (PPS). After completion of the acquisition, Ai Qiyi will likely change the overall content and production line of PPS so that they can complement each other's shortages. Many people are optimistic about this merger, Ai Qiyi can complement its shortage on PC side and PPS can also get more copyrighted film an...

   Ai Qiyi,Sohu,Youku,PPS,acquisition     2013-04-26 22:53:12

  Why email is crucial to Google, Microsoft and Yahoo

Google, Microsoft and Yahoo. These three companies rule webmail withGmail, Hotmail and Yahoo Mail, the three largest email services on the Internet.What might escape a lot of people, though, is just how important email services are for the online presence of those companies (yes, even for Google). To give you an idea, let’s look at some rather interesting website traffic numbers.Webmail share of site trafficAlexa can give you an estimate of how many peop...

   Gmail,Yahoo,Hotmail,Important,Email,Stat     2011-05-27 12:44:05

  What are some lesser known but useful Unix commands?

A few that come to mind, some less known, some more: xargs or parallel: run things in parallel, with lots of options sed and awk: more well-known but still super useful for processing text files, and faster than Python or Ruby m4: simple macro processor screen: powerful terminal multiplexing and session persistence yes: print a string a lot cal: nice calendar env: run a command (useful in scripts) look: find English words (or lines in a file) beginning with a string cut and paste and join: data...

   Linux,Unix,Command,Less used     2011-12-27 09:27:49

  Why isn't all internet traffic encrypted?

The biggest problem is that you must be able to verify that you're encrypting to the correct key. Without it, encryption would be practically useless, as anyone could perform a man-in-the-middle attack on the connection and remain undetected.In typical SSL/TLS, as well as other protocols using X.509, this verification is performed by "certification authorities", which are explicitly marked as "trusted" by web browsers and operating systems. Unfortunately, these CAs usual...

   Internet,Traffic,Encryption,Decryption,Security     2011-10-15 15:03:37

  What We’re Really Afraid Of

I recently had a very interesting conversation with a friend who recently launched an online business, and it surprised me how our fears are never what they seem to be It went something like this: B.: I need your help. I launched my product a few months ago, but I am not getting any sales. Me: Do you have traffic? B.: Not much, about 100 visitors a month Me: Then you need to get more traffic. You probably need at least 100x that amount in your market to start seeing any sales. B.: And how do...

   Developer,Career,Idea,Refuse,Afraid     2012-01-06 02:30:42

  Including Related Objects in Queries

Every time you hit a mobile network, it slows your users down and introduces another point of failure. So when you're designing your application, you need to take advantage of every opportunity to omit needless requests. Parse's philosophy is to help make this easier by providing standard ways to reduce network requests. One example is caching queries, which lets you avoid resending requests you've already sent. Another example, which we've launched in the most recent version of the...

   Software design,Request,Network load,Resource manage,Mobile     2011-12-07 08:51:56

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