diff --git a/linux/advanced/vscode-server/dotnet-full/Dockerfile b/linux/advanced/vscode-server/dotnet-full/Dockerfile
index c7569fd6c..5b1359f11 100644
--- a/linux/advanced/vscode-server/dotnet-full/Dockerfile
+++ b/linux/advanced/vscode-server/dotnet-full/Dockerfile
@@ -14,30 +14,14 @@ ENV BuildDocker true
 ##################################################################
 #                    dotnet setup
 ##################################################################
-ENV DOTNET_CHANNEL=LTS
+ENV DOTNET_CHANNEL=STS
 ENV DOTNET_ROOT=${EMG_LOCAL_BASE_DIR}/dotnet/${DOTNET_CHANNEL}
 ARG DOTNET_TOOLS_DIR=${DOTNET_ROOT}/tools
 ARG DOTNET_INSTALL_DIR=${DOTNET_ROOT}
 ARG DOTNET_INSTALL_SCRIPT_URL=https://dotnet.microsoft.com/download/dotnet/scripts/v1/dotnet-install.sh
 
-# Opt out of the telemetry feature
 ENV DOTNET_CLI_TELEMETRY_OPTOUT=true
-# Disable first time experience
 ENV DOTNET_SKIP_FIRST_TIME_EXPERIENCE=true
-# Configure Kestrel web server to bind to port 80 when present
-ENV ASPNETCORE_URLS=\
-# Enable detection of running in a container
-ENV DOTNET_RUNNING_IN_CONTAINER=true
-# Enable correct mode for dotnet watch (only mode supported in a container)
-ENV DOTNET_USE_POLLING_FILE_WATCHER=true
-# Skip extraction of XML docs - generally not useful within an image/container - helps perfomance
-ENV NUGET_XMLDOC_MODE=skip
-# unofficial support of openssl1.1 instead of 1.0 [https://stackoverflow.com/questions/51901359]
-ENV CLR_OPENSSL_VERSION_OVERRIDE=45
-# PowerShell telemetry for docker image usage
-ENV POWERSHELL_DISTRIBUTION_CHANNEL=PSDocker-DotnetSDK-Ubuntu-20.04
-
-RUN mkdir -p /usr/share/dotnet/host/fxr
 
 ##################################################################
 #                   installing dotnet
@@ -65,9 +49,9 @@ RUN echo "=============================================" && \
 #                    Mono
 ##################################################################
 RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF && \
-    echo "deb https://download.mono-project.com/repo/ubuntu stable-focal main" | sudo tee /etc/apt/sources.list.d/mono-official-stable.list && \
+#    echo "deb https://download.mono-project.com/repo/ubuntu stable-focal main" | sudo tee /etc/apt/sources.list.d/mono-official-stable.list && \
 #    echo "deb https://download.mono-project.com/repo/ubuntu nightly-focal main" | sudo tee /etc/apt/sources.list.d/mono-official-nightly.list && \
-#    echo "deb https://download.mono-project.com/repo/ubuntu preview-focal main" | sudo tee /etc/apt/sources.list.d/mono-official-preview.list && \
+    echo "deb https://download.mono-project.com/repo/ubuntu preview-focal main" | sudo tee /etc/apt/sources.list.d/mono-official-preview.list && \
     apt-get update && \
     apt-get install -y  --allow-unauthenticated \
     mono-complete \
diff --git a/linux/advanced/vscode-server/dotnet/Dockerfile b/linux/advanced/vscode-server/dotnet/Dockerfile
index ae445cdc3..53829e0a5 100644
--- a/linux/advanced/vscode-server/dotnet/Dockerfile
+++ b/linux/advanced/vscode-server/dotnet/Dockerfile
@@ -14,31 +14,14 @@ ENV BuildDocker true
 ##################################################################
 #                    dotnet setup
 ##################################################################
-ENV DOTNET_CHANNEL=LTS
+ENV DOTNET_CHANNEL=STS
 ENV DOTNET_ROOT=${EMG_LOCAL_BASE_DIR}/dotnet/${DOTNET_CHANNEL}
 ARG DOTNET_TOOLS_DIR=${DOTNET_ROOT}/tools
 ARG DOTNET_INSTALL_DIR=${DOTNET_ROOT}
 ARG DOTNET_INSTALL_SCRIPT_URL=https://dotnet.microsoft.com/download/dotnet/scripts/v1/dotnet-install.sh
 
-# Opt out of the telemetry feature
 ENV DOTNET_CLI_TELEMETRY_OPTOUT=true
-# Disable first time experience
 ENV DOTNET_SKIP_FIRST_TIME_EXPERIENCE=true
-# Configure Kestrel web server to bind to port 80 when present
-ENV ASPNETCORE_URLS=\
-# Enable detection of running in a container
-ENV DOTNET_RUNNING_IN_CONTAINER=true
-# Enable correct mode for dotnet watch (only mode supported in a container)
-ENV DOTNET_USE_POLLING_FILE_WATCHER=true
-# Skip extraction of XML docs - generally not useful within an image/container - helps perfomance
-ENV NUGET_XMLDOC_MODE=skip
-# unofficial support of openssl1.1 instead of 1.0 [https://stackoverflow.com/questions/51901359]
-ENV CLR_OPENSSL_VERSION_OVERRIDE=45
-# PowerShell telemetry for docker image usage
-ENV POWERSHELL_DISTRIBUTION_CHANNEL=PSDocker-DotnetSDK-Ubuntu-20.04
-
-
-RUN mkdir -p /usr/share/dotnet/host/fxr
 
 ##################################################################
 #                   installing dotnet
diff --git a/linux/advanced/vscode-server/mono/Dockerfile b/linux/advanced/vscode-server/mono/Dockerfile
index 9540bfbd6..07d0202b8 100644
--- a/linux/advanced/vscode-server/mono/Dockerfile
+++ b/linux/advanced/vscode-server/mono/Dockerfile
@@ -15,9 +15,9 @@ ENV BuildDocker true
 #                    Mono
 ##################################################################
 RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF && \
-    echo "deb https://download.mono-project.com/repo/ubuntu stable-focal main" | sudo tee /etc/apt/sources.list.d/mono-official-stable.list && \
+#    echo "deb https://download.mono-project.com/repo/ubuntu stable-focal main" | sudo tee /etc/apt/sources.list.d/mono-official-stable.list && \
 #    echo "deb https://download.mono-project.com/repo/ubuntu nightly-focal main" | sudo tee /etc/apt/sources.list.d/mono-official-nightly.list && \
-#    echo "deb https://download.mono-project.com/repo/ubuntu preview-focal main" | sudo tee /etc/apt/sources.list.d/mono-official-preview.list && \
+    echo "deb https://download.mono-project.com/repo/ubuntu preview-focal main" | sudo tee /etc/apt/sources.list.d/mono-official-preview.list && \
     apt-get update && \
     apt-get install -y  --allow-unauthenticated \
     mono-complete \