Edit: Updated with new script version provided by MaxdSre. To install the Oracle JDK on a Linus server is often a tricky proposition. For one, the download page requires to confirm a prompt and only unlocks the download link after this prompt has been confirmed (via a cookie, I think)
Problem ChromeDriver and Headless Chrome are a great solution for running automated JavaScript tests. Today I wanted to run some tests on a Linux Server (Centos 7) and although Chrome and ChromeDriver were installed correctly, my Java app would just hang after ChromeDriver is started: Starting ChromeDriver 2.33.506092
The HTTPS module of Node.js allows making HTTPS request to other servers. Unfortunately, making requests with this module often leads to poor performance. I found that calling a nearby HTTPS server usually took between 300 ms and 150 ms. With the following simple solution, I was able to reduce
mysql
There are many ways to back up a MySQL or MariaDB server. Some ways include using mysqldump, mydumper, LVM Snapshots or XtraBackup. However, any robust backup solution boils down to one key requirement: The ability to restore the databases to a point-in-time. So, for instance, if your server crashes, you
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
