Check if Process is Running Inside Docker Container

Identifying whether a process is running inside a Docker container is a useful diagnostic step when working with containerized applications. Container environments isolate processes from the underlying host, which can sometimes make it difficult to determine the execution context. This tutorial explains how to check if process is running inside Docker container.

One simple method is to check for the /.dockerenv file. Docker typically creates this file inside containers, making its presence a convenient indicator that the current environment is running within Docker.

Run the following command to check the environment:

test -f /.dockerenv && echo 'Docker' || echo 'Not Docker'

If the process is running inside a Docker container, the command will return Docker.