org.apache.jasper.JasperException: java.lang.IllegalStateException: No output folder
This error can happen on Linux and Windows, and the cause could be the same. On Windows Server 2012R2 I opened a command prompt. To be able to delete a directory from the Tomcat webapps folder, I have issued the shutdown command. When I started the…
How to create a Docker repository in Artifactory
Artifactory supports multiple repository types, Docker is one of them. To create a new Docker repository in Artifactory Set the Custom Base URL of the Artifactory server From the Artifactory documentation at…
`pwd’: No such file or directory – getcwd (Errno::ENOENT)
When you rename a subdirectory under the directory where your Linux or MacOS terminal is open you may get the error message /opt/chefdk/embedded/lib/ruby/gems/2.4.0/gems/chef-13.4.19/lib/chef/knife/cookbook_download.rb:45:in `pwd’: No such file or…
Migrate a WordPress web site to DreamHost
DreamHost is one of the recommended WordPress hosting providers. The DreamHost website has an extensive knowledge base, but the necessary steps to move your live site from another provider are scattered over multiple pages at…
Failed to complete #create action: [undefined method `version’ for nil:NilClass] on …
When you execute kitchen converge to launch an EC2 instance in AWS with Chef Test Kitchen, you get the error message: >>>>> ——Exception——- >>>>>> Class: Kitchen::ActionFailed…
Vagrant installation
Vagrant Installation Warning! The new versions of Vagrant delete the contents of the /opt/vagrant directory. If you want to keep old versions of Vagrant, first move them out of the /opt directory. Download Vagrant from https://www.vagrantup.com/ and…
Ubuntu gets stuck in a login loop
When I rebooted my Ubuntu machine it started to repeatedly ask for the password. When I entered the correct password, the screen went black and asked for the password again. The problem was an error in the ~/.profile file. To log into the Ubuntu terminal…
DevOps Engineering part 1. (Ubuntu) – Install the DevOps development tools on Ubuntu
DevOps Software installation on Ubuntu There are multiple ways to install software on Ubuntu Install a .deb package from the local drive with dpkg Install the software from the internet with apt Show hidden files To be able to see hidden files in Files…
Configure the Ubuntu virtual machine in VirtualBox
Enable shared folders on the virtual machines To be able to use shared folders between the host ( your workstation ) and the virtual machine. Start the Ubuntu virtual machine in Virtual Box, Select the virtual machine window on your workstation, In…
Configure the Windows virtual machine in VirtualBox
Enable shared folders on the virtual machine To be able to use shared folders between the host ( your workstation ) and the Windows virtual machine. Start the Windows virtual machine in VirtualBox, Select the virtual machine window on your workstation,…