This Virtualbox tutorial will show you how to take a snapshot on Virtualbox. First you will see how to take a snapshot of a running virtual machine. You will then see how to restore the snapshot. Snapshots allow you to save the state of a virtual machine; this can be useful when you want to test something, or you’re about to make a change to that virtual machine, and you need to be able to roll back to a working instance. Snapshots have saved me on numerous occasions and are an excellent feature!
This video will show you how to generate a Certificate Signing Request CSR on CentOS 8.
A CSR is normally sent to a certificate provider who will supply you with a certificate based from the CSR.
This video uses CentOS 8 Linux however the process should be much the same on all Linux operating systems.
The commands in this video are:
- sudo yum install openssl
- openssl req -new -newkey rsa:2048 -nodes -keyout yourkeyname.key yourdomainname.csr
This short video will show you how to install PHP on CentOS 8.
The command you need to run is:
Sudo yum install php.
This command will also work on older versions of Centos is including Centos & and it will also work on Redhat Linux RHEL
This Video will show you how to solve the error: unable to open primary script permission denied on Centos 8.
In this video i was trying to install moodle and when i went to access the site, I kept getting an error. In the Apache logs i could see the error: unable to open primary script: ‘Unable to open primary script varwwwhtmlmoodleindex.php (Permission denied)
When i delved into the error i could see that it was selinux was causing the issue.
You can disable selinux on the fly by entering: sudo setenforce 0
but to permanently disable you should edit the/etc/selinux/config file and
set selinux to disabled SELINUX=disabled
This Video will show you how to ensure that a service or program starts on boot on Linux. This video was recorded on CentOS 8 but the method shoudl work on most Linux Distros including Ubuntu.
The command that you need to run is:
sudo chkconfig servicename on
This command will ensure that the service starts on boot on Linux
This Java Keytool Tutorial will show you how to export a Certificate from a Java Keystore.
To begin you will first run (Note ensure that you update the relvnet commands to reflect your Keystore, alias and certificate names) :
keytool -list -keystore keystore.jks
to see what certificates reside in the java keystore.
Next you will run:
keytool -exportcert -alias domain -file domain.der -keystore keystore.jks
to export the Certificate.
This video will show you how to SSH into a VirtualBox Machine. This video is using CentOS although the concepts should be much the same for other Linux Distros. This Linux Tutorial shows you what do to when you can’t SSH into VirtualBox Machine. First you will need to power off your VM. Next you will need to right click, settings, click network, select adopter 2 and enable VirtualBox host only adapter. Once done you will need to power on the machine. Next you will need to make sure that this new connection has an IP address. In CentOS this is done by creating a new network connection in the /etc/sysconfig/network-scripts folder. We then configure this network have a DHCP IP address and restart the network connection. Once done we restart the network, and SSH in to our machine.
This Mac tutorial will show you how to correct sound not working on Mac. It will show you what to check when you have no sound on Mac.
It will show you where to access the Mac Audio settings and the changes need to select your audio outputs.
As part of sound troubleshooting we will access systems preferences the audio and then change our audio output to internal.
This CentOS 8 tutorial will show you how to install CentOS 8 on VirtualBox. To begin you will see how to create a Virtual machine on VirtualBox. Next you will see how to download CentOS 8 to windows. Next you will see the CentOS 8 installation process. You will mount the CentOS 8 installation media into VirtualBox. Next you will see the CentOS 8 installation process step by step.7 Finally you will log into CentOS 8 server. This installation of CentOS 8 on VirtualBox take place on windows, in affect showing you how to run CentOS 8 on windows 10. The Install process will be the same if you are running on a physical machine.
When trying to use screen recording software with VirtualBox the mouse integration would not work. Every time I clicked within my VM the mouse would shoot to the other side of the screen. This video shows you how to fix VirtualBox mouse integration issues when it is not working with your screen recorder.