diff --git a/.github/scripts/Dockerfile.in b/.github/scripts/Dockerfile.in
index 4a708c3..e46f85d 100644
--- a/.github/scripts/Dockerfile.in
+++ b/.github/scripts/Dockerfile.in
@@ -9,6 +9,8 @@ ARG DEBIAN_FRONTEND=noninteractive
 ARG TZ=Europe/Paris
 
 ENV DOTNET_CLI_TELEMETRY_OPTOUT=1
+ENV OMPI_ALLOW_RUN_AS_ROOT=1
+ENV OMPI_ALLOW_RUN_AS_ROOT_CONFIRM=1
 
 RUN cd /tmp \
     && git clone --recurse-submodules https://github.com/arcaneframework/framework \
@@ -29,6 +31,6 @@ RUN cd /tmp \
     && cmake --build /tmp/build --target install \
     && cd / && rm -rf /tmp/*
 
-RUN useradd -ms /bin/bash arcane_user
-USER arcane_user
-WORKDIR /home/arcane_user
+# RUN useradd -ms /bin/bash arcane_user
+# USER arcane_user
+# WORKDIR /home/arcane_user
diff --git a/README.md b/README.md
index 045ce5f..668df9d 100644
--- a/README.md
+++ b/README.md
@@ -149,22 +149,17 @@ cd .github/scripts
 
 In these images, Arcane is installed in the default installation
 directory (`/usr/local`).
-A user is also created and used by default. This is the user
-`arcane_user`.
-Note that `sudo` is not available, so if you want to run commands
-as `root`, you need to specify the `root` user in the execute command:
-`docker exec -u root -it <image> bash`.
 If you want to compile an application using Arcane, it is not necessary
 to specify the Arcane installation directory.
 
 Here is a set of commands to compile and run `QAMA` in container :
 ```bash
-# In a termuinal, with Podman or Docker installed.
+# In a terminal, with Podman or Docker installed.
 IMAGE_ID=$(docker pull ghcr.io/arcaneframework/arcane_ubuntu-2204:gcc-12_minimal_release_latest)
 CONTAINER_ID=$(docker run -dt "$IMAGE_ID")
 docker exec -it "$CONTAINER_ID" bash
 
-# Interactive terminal of contener.
+# Interactive terminal of container.
 cd /tmp
 git clone https://github.com/arcaneframework/arcane-benchs
 mkdir build/