Oracle VM VirtualBox Manager

to install linux ubuntu, go and download iso files : https://www.ubuntu.com/download/desktop/thank-you?country=GB&version=18.04.1&architecture=amd64

Internet Connection on VM

I was having the same problem on Ubuntu 12.10 64bit using Virtualbox 4.2.22. Here are the steps I took to solve my problem:

Open Virtualbox Manager

• Select the machine you cannot get internet on in the left pane
• Click the Settings button in the top menu
• Click Network in the left pane in the settings window
• Switched to Bridged Adapter in the Attached to drop-down menu
• Select the name of the network adapter you are currently using on your host machine. I am using wireless so I chose eth0 which is my wireless network adapter. You can check which adapter you are currently using by opening the terminal (CTRL+ALT+T by default) and running ifconfig. It will probably be the eth adapter that shows an inet addr and shows data transfer next to RX bytes.
• Under Advanced, make sure the machine is using the Desktop Adapter Type
• Under Advanced, make sure Promiscuous Mode is set to Allow VMs
• Under Advanced, make sure Cable connected is checked on
• Hit OK to save your changes
• Start your VM

to remote access

remove OpenSSH: Code:

sudo apt-get remove openssh-client openssh-server

install OpenSSH again: Code:

sudo apt-get install openssh-client openssh-server

mysql

The reason is that recent Ubuntu installation (maybe others also), mysql is using by default the UNIX auth_socket plugin.

Basically means that: db_users using it, will be "auth" by the system user credentias. You can see if your root user is set up like this by doing the following:

$ sudo mysql -u root # I had to use "sudo" since is new installation

mysql> USE mysql;
mysql> SELECT User, Host, plugin FROM mysql.user;

+------------------+-----------------------+
| User             | plugin                |
+------------------+-----------------------+
| root             | auth_socket           |
| mysql.sys        | mysql_native_password |
| debian-sys-maint | mysql_native_password |
+------------------+-----------------------+

As you can see in the query, the root user is using the auth_socket plugin

There are 2 ways to solve this:

• You can set the root user to use the mysql_native_password plugin
• You can create a new db_user with you system_user (recommended)

Option 1:

$ sudo mysql -u root # I had to use "sudo" since is new installation

mysql> USE mysql;
mysql> UPDATE user SET plugin='mysql_native_password' WHERE User='root';
mysql> FLUSH PRIVILEGES;
mysql> exit;

$ service mysql restart

Option 2: (replace YOUR_SYSTEM_USER with the username you have)

$ sudo mysql -u root # I had to use "sudo" since is new installation

mysql> USE mysql;
mysql> CREATE USER 'YOUR_SYSTEM_USER'@'localhost' IDENTIFIED BY '';
mysql> GRANT ALL PRIVILEGES ON *.* TO 'YOUR_SYSTEM_USER'@'localhost';
mysql> UPDATE user SET plugin='auth_socket' WHERE User='YOUR_SYSTEM_USER';
mysql> FLUSH PRIVILEGES;
mysql> exit;

$ service mysql restart

Remember that if you use option #2 you'll have to connect to mysql as your system username (mysql -u YOUR_SYSTEM_USER)

Note: On some systems (e.g., Debian stretch) 'auth_socket' plugin is called 'unix_socket', so the corresponding SQL command should be: UPDATE user SET plugin='unix_socket' WHERE User='YOUR_SYSTEM_USER';