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Permission denied (publickey) when SSH Access to Amazon EC2 instance [closed]

...ppen if you have messed up the /home/<username>/.ssh/authorized_keys file on your EC2 instance. About 2., the information about which username you should use is often lacking from the AMI Image description. But you can find some in AWS EC2 documentation, bullet point 4. : http://docs.aws.am...
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How do I syntax check a Bash script without running it?

...ind . -name '*.sh' -exec bash -n {} \; If you want to use it for a single file, just edit the wildcard with the name of the file. share | improve this answer | follow ...
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Why are Docker container images so large?

I made a simple image through Dockerfile from Fedora (initially 320 MB). 8 Answers 8 ...
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Configure Microsoft.AspNet.Identity to allow email address as username

... Where exactly in the code (in which file / method) (in a default mvc5 app) should I put UserManager.UserValidator = new UserValidator<TUser>(UserManager) { AllowOnlyAlphanumericUserNames = false }? Thanks. – PussInBoots ...
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Convert blob URL to normal URL

...browser to a server and have the server make it available like an ordinary file. It is possible convert a blob: URL into a data: URL, at least in Chrome. You can use an AJAX request to "fetch" the data from the blob: URL (even though it's really just pulling it out of your browser's memory, not mak...
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What does rake db:test:prepare actually do?

...tions and, load the test schema That is, it will look your db/schema.rb file to determine if any migrations that exist in your project that have not been run. Assuming there are no outstanding migrations, it will then empty the database and reload it based on the contents of the db/schema.rb file...
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How to make an app's background image repeat

... drawable-mdpi & drawable-ldpi, you'll need to add this backrepeat.xml file and the relevant images to each of these to allow this functionality in high, medium and low dpi (dots per inch) screen sizes. – saber tabatabaee yazdi Nov 13 '13 at 14:29 ...
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How can I tell Rails to use RSpec instead of test-unit when creating a new Rails app?

...the command rails new foo , it uses test-unit to generate the test stub files instead of rspec . 5 Answers ...
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Java, Classpath, Classloading => Multiple Versions of the same jar/project

...rsion of jars: URLClassLoader loader1 = new URLClassLoader(new URL[] {new File("httpclient-v1.jar").toURL()}, Thread.currentThread().getContextClassLoader()); URLClassLoader loader2 = new URLClassLoader(new URL[] {new File("httpclient-v2.jar").toURL()}, Thread.currentThread().getContextClassLoader(...
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Can an Option in a Select tag carry multiple values?

...achieved it by using the php explode function, like this: HTML Form (in a file I named 'doublevalue.php': <form name="car_form" method="post" action="doublevalue_action.php"> <select name="car" id="car"> <option value="">Select Car</option&g...