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What is an OS kernel ? How does it differ from an operating system? [closed]

...ernel is an operating system in that sense. The end-user definition is usually something around "a software package that provides a desktop, shortcuts to applications, a web browser and a media player". A kernel doesn't match that definition. So for an end-user a Linux distribution (say Ubuntu) is...
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IPC performance: Named Pipe vs Socket

...peed testing, you should try socat, which is a very versatile program that allows you to create almost any kind of tunnel. share | improve this answer | follow ...
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What does Java option -Xmx stand for? [duplicate]

...it says, -Xmxn Specify the maximum size, in bytes, of the memory allocation pool. This value must a multiple of 1024 greater than 2MB. Append the letter k or K to indicate kilobytes, or m or M to indicate megabytes. The default value is 64MB. The upper limit for this value will be approxim...
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Setting Authorization Header of HttpClient

...ent = new HttpClient()) { client.DefaultRequestHeaders.Authorization = _username.ToAuthHeaderValue(_password); } Again I think 2 above options make the client using statement a bit less repetitive. Keep in mind that it's best practice to reuse the HttpClient if you are making multiple http ca...
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Set title background color

...stomTitleBar" android:theme="@style/customTheme" ... From the Activity (called CustomTitleBar) : @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_CUSTOM_TITLE); setContentView(R.layout.main); ...
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Difference between and

...s will not submit a form - they don't do anything by default. They're generally used in conjunction with JavaScript as part of an AJAX application. <input type="submit"> buttons will submit the form they are in when the user clicks on them, unless you specify otherwise with JavaScript. ...
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Pure virtual function with implementation

...e type can still define an implementation. A derived class can explicitly call the base class implementation (if access permissions allow it) by using a fully-scoped name (by calling A::f() in your example - if A::f() were public or protected). Something like: class B : public A { virtual voi...
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How do I get a file name from a full path with PHP?

...ray with the parts of the path. Or for the case here, you can just specifically ask for the filename. So pathinfo('/var/www/html/index.php', PATHINFO_FILENAME) should return 'index.php' PHP Pathinfo documentation – OnethingSimple Apr 19 '15 at 13:54 ...
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Adding an onclick function to go to url in JavaScript?

... @FayazMd not sure what you're trying to do? Usually if it's JavaScript inside the DOM (currenty inside DOM's element a) as a web page you can not control JS behaviour on the next page (where you're redirecting the browser page). When user leaves the page it's done. Unle...
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Make $JAVA_HOME easily changable in Ubuntu [closed]

In Ubuntu, I'd like to switch my JAVA_HOME environment variable back and forth between Java 5 and 6. 8 Answers ...