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Step 1: Log in to the Oracle account

Open the terminal and log in to the Oracle account.

Navigate to the <span>.vnc</span> directory. If the <span>xstartup</span> file does not exist, create one and edit it with the following content:

<span>#!/bin/shunset SESSION_MANAGER</span>

<span>xrdb $HOME/.Xresources</span>

<span>xsetroot -solid grey</span>

<span>x-window-manager &</span>

<span>/etc/X11/Xsession</span>

<span>exec /etc/X11/xinit/xinitrc</span>

Step 2: Start VNC

In the terminal, run:

<span>oracle@deepin:~/.vnc$ tigervncserver</span>

Take note of the <span>:1</span> that appears, as it will be used later.

After that, use <span>vncviewer</span> to successfully connect to the desktop.

Step 3: Start <strong><span>dbca</span></strong>

If after running <span>dbca</span> you see the message "DISPLAY NOT SET," execute the following commands:

<span>oracle@deepin:~$ export DISPLAY=:1 # :1 is the VNC display number shown when you started VNC</span>

<span>oracle@deepin:~$ xhost +</span>

<span>access control disabled, clients can connect from any host # When this line appears, the setup is correct</span>

<span>oracle@deepin:~$ dbca # Run the dbca command</span>

The desktop will display the <span>dbca</span> graphical interface. If Chinese characters appear as boxes, you'll need to modify environment variables to fix this issue.

Step 4: Solution for Chinese Characters Displaying as Boxes

To resolve the issue of Chinese characters displaying as boxes, edit the <span>.bash_profile</span> file in Oracle's home directory.

In the terminal, run:

<span>oracle@deepin:~$ vim ./.bash_profile </span>

Add the following line to the file:

<span>export LANG=en_US.UTF-8</span>

Then reload the profile:

<span>oracle@deepin:~$ source ./.bash_profile</span>

At this point, when you open <span>dbca</span>, it will display in English and there will be no more character boxes.