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 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 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 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.