How to run GUI application in the Docker Container?

Ananya Sharma
2 min readSep 26, 2021


So, let’s get started…

Step 1:- First, we will create a Docker image so whenever any container launches from this image, run the Firefox program.

FROM centos:latest
RUN yum install firefox -y
CMD firefox

Step 2:- Next, we have to build the image. Use the following command for the same:-

docker build -t myfirefox:v1

Step 3:- Now, we will launch the container from the above created image. The command is as follows:-

docker run -it — name firefoxos1 myfirefox:v1

Here, you can see that the “Error: no Display environment variable specified”. So, you must also provide the container with a DISPLAY environment variable. This instructs X clients — your graphical programs — which X server to connect to. Set DISPLAY in the container to the value of $DISPLAY on your host. The following is the command for the same:-

docker run -it — name firefoxos2 — env =”DISPLAY” — net=host myfirefox:v1

Thanks for reading :)