aws
Problem You would like to resize a volume attached to an EC2 instance. Solution Do the following: * Create a snapshot of your volume (instructions) * Stop your instance * Go to EBS / Volumes and select Actions / Modify Volume * Enter the new size for your volume (note you can only ever make the
open-source
One of the most convinient ways to upload files from the Web Browser to the server is by using file inputs in HTML forms. Many web servers come with preconfigured modules for parsing this data on the server-side. However, sometimes, your HTTP server of choice might not offer such a
aws
Problem You have an existing server that runs a MySQL database (either on EC2 or not) and you would like to replicate this server with a Amazon RDS MySQL instance. After you follow the instructions from Amazon, your slave reports the IO status: Slave_IO_State: Connecting to master ... and
mysql
Problem You would like to upgrade MySQL 5.5 to MySQL 5.6 on an existing server that uses the YUM software package manager. Solution Just enter the following few simple commands and you should be good to go. But, please, do a thorough full backup of your system before
github
Problem Your repositories have been building just fine using the tool Travis CI but suddenly the builds do not work anymore and the Travis CI website shows a screen with the message: `This is not an active repository` Solution * Go to GitHub and assure that you are logged in with
virtualbox
Problem For a CentOS based guest, the update of the VirtualBox Guest Additions hangs after the step: "Removing exiting VirtualBox non-DKMS kernel modules" Solutions * Check the log file in /var/log/VBoxGuestAdditions-uninstall.log. See if there is anything obvious reported there you can fix. * Check if your RAM
eclipse
A good Java application should print only the absolute necessary to standard out. Not to do so can mean a serious hit in performance and can make it difficult to debug issues. Unfortunately either we ourselves or our colleagues put System.out.println() statements in the code and then forget
amazon-route-53
Problem You have create a CloudFront distribution with a custom domain name (such as yourdomain.com). Now if you try to link this distribution to your domain using Route 53, you get the following error message: `No AWS resource exists with the Alias Target that you specified.` Solution Try the
aws
Problem You are trying to create a CloudFront distribution using Amazon's API. You get the error: "One or more of your origins do not exist" Solution In my case, I provided a different value for these two properties: DistributionConfig.DefaultCacheBehavior.TargetOriginId and DistributionConfig.Origins.Items[0]
virtualbox
Problem You would like to share a folder between a VirtualBox Linux Guest and a Windows Host. Solution * Start your VM * Switch to Windowed Mode * Select Devices / Shared Folders / Shared Folder Settings ... * Create a New Folder on your Linux Guest. e.g.: * /home/[Your User]/WinDocuments * Add a new Shared
In order to test how an ObjectHub Micro App can be packaged as a PhoneGap application, I used PhoneGap Build to package up a simple application. Unfortunately, the application that I developed started off with a big, ugly black screen instead of a splash screen. It took me quite some
firebase
Firebase is build on the assumption that it will only be initialized once. This can be a problem in Node.JS applications sometimes, especially if they are run as part of an Amazon Lambda function. This can lead to errors as the following: Firebase App named '[DEFAULT]' already
