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
It's always a good idea to test the speed of your Internet connection after getting a new router of Internet provider. However, my Internet connection sometimes becomes mysteriously slow. In that case, it is great to verify that is a problem with the Internet connection or maybe with
aws
A quick Google search reveals that there are quite a few different approaches for automatically creating snapshots for EC2 images (such as here, here and here). All of these are rather difficult to do. Thankfully, after some more searching around I found a great way to schedule regular snapshots using
mysql
Today I discovered that one of my servers mysteriously ran out of disk space. I ran the following Linux command to find all the biggest files and folders on the server: sudo du -a / | sort -n -r | head -n 100 ... and found that it was the binary logs used for
