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How would I get a cron job to run every 30 minutes?

... every 30 minutes, on the hour and 30 minutes past the hour or something close. I have the following, but it doesn't seem to run on 0. ...
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How to place the ~/.composer/vendor/bin directory in your PATH?

I'm on Ubuntu 14.04 and I've been trying all possible methods to install Laravel to no avail. Error messages everything I try. I'm now trying the first method in the quickstart documentation, that is, via Laravel Installer, but it says to "Make sure to place the ~/.composer/vendor/bin directory in...
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How do I change the UUID of a virtual disk?

...l.vhd" The path for the virtual disk contains a space, so it must be enclosed in double quotes to avoid it is parsed as two parameters. share | improve this answer | follow...
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How to close Android application?

I want to close my application, so that it no longer runs in the background. 22 Answers ...
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Installing R on Mac - Warning messages: Setting LC_CTYPE failed, using “C”

I would like install R on my laptop Mac OS X version 10.7.3 6 Answers 6 ...
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socket.shutdown vs socket.close

...r required, the calling program can discard the socket by applying a close subroutine to the socket descriptor. If a reliable delivery socket has data associated with it when a close takes place, the system continues to attempt data transfer. However, if the data is still undelivered...
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How can I convert an image into a Base64 string?

...You can use the Base64 Android class: String encodedImage = Base64.encodeToString(byteArrayImage, Base64.DEFAULT); You'll have to convert your image into a byte array though. Here's an example: Bitmap bm = BitmapFactory.decodeFile("/path/to/image.jpg"); ByteArrayOutputStream baos = new ByteArray...
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boost多索引容器multi_index_container实战 - C/C++ - 清泛网 - 专注C/C++及内核技术

boost多索引容器multi_index_container实战boost多索引容器multi_index_container用法详解、性能测试等。目录: boost多索引容器multi_index_container详解 boost多索引容器multi_index_container架构图 boost多索引容器multi_index_container性能测试 原文地...
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Output to the same line overwriting previous output?

... Here's code for Python 3.x: print(os.path.getsize(file_name)/1024+'KB / '+size+' KB downloaded!', end='\r') The end= keyword is what does the work here -- by default, print() ends in a newline (\n) character, but this can be replaced with a different string...
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Static method behavior in multi-threaded environment in java

...d try and explain at a slightly more simple level for anybody who comes across this and is newish to Java. Here goes.. Memory in java is split up into two kinds - the heap and the stacks. The heap is where all the objects live and the stacks are where the threads do their work. Each thread has its ...