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How to mkdir only if a directory does not already exist?

I am writing a shell script to run under the KornShell (ksh) on AIX. I would like to use the mkdir command to create a directory. But the directory may already exist, in which case I do not want to do anything. So I want to either test to see that the directory does not exist, or suppress the "Fil...
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Why number 9 in kill -9 command in unix? [closed]

I understand it's off topic, I couldn't find anywhere online and I was thinking maybe programming gurus in the community might know this. I usually use ...
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Is it possible to Turn page programmatically in UIPageViewController?

Is it possible to turn page programmatically in UIPageViewController ? 17 Answers 17 ...
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Calling a Java method with no name

I'm looking at the code below and found something a bit strange: 8 Answers 8 ...
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How to make a floated div 100% height of its parent?

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How to add facebook share button on my website?

I have this code that suppose to work, but doesn't work. If this helps you in anyway that would be great. 7 Answers ...
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static constructors in C++? I need to initialize private static objects

I want to have a class with a private static data member (a vector that contains all the characters a-z). In java or C#, I can just make a "static constructor" that will run before I make any instances of the class, and sets up the static data members of the class. It only gets run once (as the vari...
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Read entire file in Scala?

What's a simple and canonical way to read an entire file into memory in Scala? (Ideally, with control over character encoding.) ...
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create a trusted self-signed SSL cert for localhost (for use with Express/Node)

Trying to follow various instructions on creating a self-signed cert for use with localhost, Most of the instructions seem to be for IIS, but I'm trying to use Nodejs/Express. None of them work properly because while the cert gets installed, it is not trusted. here's what I've tried that fails: ...
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Replace string within file contents

How can I open a file, Stud.txt, and then replace any occurences of "A" with "Orange"? 8 Answers ...