Teaching how to create a bootable USB flash drive

  1. Insert a USB flash drive into a running computer.
  2. Open a Command Prompt window as an administrator.
  3. Type diskpart.
  4. In the new command line window that opens, to determine the USB flash drive number or drive letter, at the command prompt, type list disk, and then click ENTER. The list disk command displays all the disks on the computer. Note the drive number or drive letter of the USB flash drive.
  5. At the command prompt, type select disk , where X is the drive number or drive letter of the USB flash drive, and then click ENTER.
  6. Type clean, and the click ENTER. This command deletes all data from the USB flash drive.
  7. To create a new primary partition on the USB flash drive, type create part pri, and then click ENTER.
  8. To select the partition that you just created, type select part 1, and then click ENTER.
  9. To format the partition, type format
    fs=fat32 quick, and then click ENTER.

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Teaching how to configure Virtual Box Network Configuration

You can try NAT based connection and it will work just fine, but you will not be able to access your VM servers externally, unless you map ports. Another option is to use “Bridge Adapter”. Look:

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Teaching How to install Google Chrome on OEL

  • As root, run the following command:

cat << EOF > /etc/yum.repos.d/google-chrome.repo


name=google-chrome – \$basearch






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Teaching How to Install VNC Server

In order to install VNC Server on Ubuntu 16.04 follow the next instructions (refer to https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-vnc-on-ubuntu-16-04 for more information)

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Teaching How to Install SOAPUI on Linux

  1. Download open source SOAPUI – https://www.soapui.org/downloads/latest-release.html
  2. Select “Linux Installer (64-bit)” – Adjust accordingly.
  3. Click on Download.
  4. Once it is download, chmod 755 SoapUI-x64-5.2.1.sh
  5. Then run it: ./SoapUI-x64-5.2.1.sh
  6. A pop-up will open. Accept all the defaults and follow the wizard to get it installed.
  7. It will be installed by default under: $HOME/SmartBear/SoapUI-5.2.1/bin/SoapUI-5.2.1
  8. Select to open it at the end or double click the “SoapUI 5.2.1.desktop” icon at the Desktop.

Teaching How to Add another storage volume to an existing VBox VM (Ubuntu)

If you need to add an extra volume storage into an existing VBox VM, you can use VirtualBox for that.

  • Stop your VM and go to Virtual Box – Storage
  • Select the Controller: SATA and click the green plus icon to add a new disk
  • Select the type and size
  • Start your instance
  • Once it is running you have to format and mount the new disk, for this, as root run

    fdisk –l or lsblk



    This will let you discover the name of the extended volume. In this case it is /dev/sdb

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Teaching How to Create SSH keys for Oracle Public Cloud (OPC) access

This section shows you how to create an SSH Key pair to be used to provision Oracle Cloud Services and later on to be able to authenticate via SSH connection from your SSH client.

Oracle Cloud services such as Oracle Java Cloud Service and Oracle Database Cloud – Database as a Service are built on top of infrastructure and functionality that are provided by Oracle Compute Cloud Service. When you create a service instance of one of these Oracle Cloud services, all the Oracle Compute virtual machines (VMs) required to support the service instance are provisioned and configured for you.

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Teaching How to Install and configuring Firewall (GUFW) in Ubuntu

For more information, refer to: https://help.ubuntu.com/community/Gufw

Gufw is a firewall powered by UFW (Uncomplicated Firewall). For an overview of firewalls, please see Firewall.

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Teaching How to Install SSH server in your XUbuntu (16.0.4) Dev env

I took these instructions from: http://ubuntuhandbook.org/index.php/2016/04/enable-ssh-ubuntu-16-04-lts/

  1. To install it, open terminal (Ctrl+Alt+T) or log in Ubuntu server and run command:

    sudo apt-get install openssh-server

  2. After that, you should have SSH service enabled in your system, you may check its status by running command:

    sudo service ssh status

  3. You may change some settings (e.g., the listening port, and root login permission) by editing the configuration file via command. Otherwise if you are happy with the default settings, you are done!

    sudo nano /etc/ssh/sshd_config

Finally apply the changes by restarting or reloading SSH:

sudo service ssh restart

Teaching how to Update the hostname in your XUbuntu (16.0.4) Dev environment

I based these instructions from: http://askubuntu.com/questions/9540/how-do-i-change-the-computer-name

If, for whatever reason you need to change your hostname, as I had to, you need to edit the computer name in two files:




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