diff --git a/tools/ci_build/github/linux/docker/Dockerfile.ubuntu b/tools/ci_build/github/linux/docker/Dockerfile.ubuntu
index 11672000a8..df9d5ae486 100644
--- a/tools/ci_build/github/linux/docker/Dockerfile.ubuntu
+++ b/tools/ci_build/github/linux/docker/Dockerfile.ubuntu
@@ -1,7 +1,6 @@
-ARG OS_VERSION=18.04
-FROM ubuntu:${OS_VERSION}
+FROM ubuntu:20.04
 
-ARG PYTHON_VERSION=3.6
+ARG PYTHON_VERSION=3.8
 
 ADD scripts /tmp/scripts
 RUN /tmp/scripts/install_ubuntu.sh -p $PYTHON_VERSION && /tmp/scripts/install_os_deps.sh && /tmp/scripts/install_python_deps.sh -p $PYTHON_VERSION && rm -rf /tmp/scripts
diff --git a/tools/ci_build/github/linux/docker/Dockerfile.ubuntu_for_android b/tools/ci_build/github/linux/docker/Dockerfile.ubuntu_for_android
deleted file mode 100644
index de98c2cefe..0000000000
--- a/tools/ci_build/github/linux/docker/Dockerfile.ubuntu_for_android
+++ /dev/null
@@ -1,14 +0,0 @@
-ARG OS_VERSION=20.04
-FROM ubuntu:${OS_VERSION}
-
-ARG PYTHON_VERSION=3.8
-ADD scripts /tmp/scripts
-RUN /tmp/scripts/install_ubuntu.sh -p $PYTHON_VERSION && /tmp/scripts/install_deps_android.sh && /tmp/scripts/install_protobuf.sh && rm -rf /tmp/scripts
-
-WORKDIR /root
-
-ARG BUILD_UID=1000
-ARG BUILD_USER=onnxruntimedev
-RUN adduser --gecos 'onnxruntime Build User' --disabled-password $BUILD_USER --uid $BUILD_UID
-WORKDIR /home/$BUILD_USER
-USER $BUILD_USER
diff --git a/tools/ci_build/github/linux/docker/Dockerfile.ubuntu_openvino b/tools/ci_build/github/linux/docker/Dockerfile.ubuntu_openvino
index 42f8bf00af..e988155c5f 100644
--- a/tools/ci_build/github/linux/docker/Dockerfile.ubuntu_openvino
+++ b/tools/ci_build/github/linux/docker/Dockerfile.ubuntu_openvino
@@ -1,13 +1,11 @@
-ARG OS_VERSION=18.04
-FROM ubuntu:${OS_VERSION}
+FROM ubuntu:20.04
 
-ARG PYTHON_VERSION=3.5
 ARG OPENVINO_VERSION=2021.4
 
 ADD scripts /tmp/scripts
-RUN /tmp/scripts/install_ubuntu.sh -p $PYTHON_VERSION -d EdgeDevice && \
+RUN /tmp/scripts/install_ubuntu.sh -p 3.8 -d EdgeDevice && \
     /tmp/scripts/install_os_deps.sh -d EdgeDevice && \
-    /tmp/scripts/install_python_deps.sh -p $PYTHON_VERSION -d EdgeDevice
+    /tmp/scripts/install_python_deps.sh -p 3.8 -d EdgeDevice
 
 RUN apt update && apt install -y libnuma1 ocl-icd-libopencl1 && \
     rm -rf /var/lib/apt/lists/* /tmp/scripts
diff --git a/tools/ci_build/github/linux/docker/scripts/install_deps_android.sh b/tools/ci_build/github/linux/docker/scripts/install_deps_android.sh
deleted file mode 100755
index 1be5703d87..0000000000
--- a/tools/ci_build/github/linux/docker/scripts/install_deps_android.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/bash
-set -e
-
-python3 -m pip install cmake==3.21.0
-
-cmake --version
-
-# Download Android NDK r20, move /temp_ndk/android-ndk-<version> to /android_ndk
-wget -qO- -O temp.zip https://dl.google.com/android/repository/android-ndk-r20-linux-x86_64.zip && unzip -oq temp.zip -d /temp-ndk && mv /temp-ndk/* /android-ndk && rm temp.zip && rm -rf /temp-ndk && ls /android-ndk
-
-apt-get -y remove libprotobuf-dev protobuf-compiler
diff --git a/tools/ci_build/github/linux/run_build.sh b/tools/ci_build/github/linux/run_build.sh
index 373fa27d1d..52bcc6db88 100755
--- a/tools/ci_build/github/linux/run_build.sh
+++ b/tools/ci_build/github/linux/run_build.sh
@@ -1,4 +1,8 @@
 #!/bin/bash
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License.
+
+# This file is used by Linux Multi GPU TensorRT CI Pipeline,Linux Nuphar CI Pipeline,Linux OpenVINO CI Pipeline,orttraining-linux-gpu-ci-pipeline
 set -e -o -x
 
 id
@@ -19,16 +23,7 @@ done
 
 export PATH=$PATH:/usr/local/gradle/bin
 
-if [ $BUILD_OS = "android" ]; then
-    pushd /onnxruntime_src
-    mkdir build-android && cd build-android
-    if [ $BUILD_DEVICE = "nnapi" ]; then
-        cmake -DCMAKE_TOOLCHAIN_FILE=/android-ndk/build/cmake/android.toolchain.cmake -DANDROID_ABI=arm64-v8a -DONNX_CUSTOM_PROTOC_EXECUTABLE=/usr/bin/protoc -Donnxruntime_USE_NNAPI_BUILTIN=ON ../cmake
-    else
-        cmake -DCMAKE_TOOLCHAIN_FILE=/android-ndk/build/cmake/android.toolchain.cmake -DANDROID_ABI=arm64-v8a -DONNX_CUSTOM_PROTOC_EXECUTABLE=/usr/bin/protoc ../cmake
-    fi
-    make -j$(nproc)
-elif [ $BUILD_OS = "yocto" ]; then
+if [ $BUILD_OS = "yocto" ]; then
     YOCTO_FOLDER="4.19-warrior"
     if [ $YOCTO_VERSION = "4.14" ]; then
         YOCTO_FOLDER="4.14-sumo"
diff --git a/tools/ci_build/github/linux/run_dockerbuild.sh b/tools/ci_build/github/linux/run_dockerbuild.sh
index f9f871c5bb..5e76e435c0 100755
--- a/tools/ci_build/github/linux/run_dockerbuild.sh
+++ b/tools/ci_build/github/linux/run_dockerbuild.sh
@@ -1,4 +1,8 @@
 #!/bin/bash
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License.
+
+# This file is used by Linux Multi GPU TensorRT CI Pipeline,Linux Nuphar CI Pipeline,Linux OpenVINO CI Pipeline,orttraining-linux-gpu-ci-pipeline
 #This file is only for Linux pipelines that build on ubuntu. All the docker images here are based on ubuntu.
 #Please don't put CentOS or manylinux2014 related stuffs here.
 set -e -o -x
@@ -21,9 +25,9 @@ echo "ALLOW_RELEASED_ONNX_OPSET_ONLY environment variable is set as "$ALLOW_RELE
 while getopts o:d:p:x:v:y:t:i:mue parameter_Option
 do case "${parameter_Option}"
 in
-#android, yocto, ubuntu20.04
+#yocto, ubuntu20.04
 o) BUILD_OS=${OPTARG};;
-#gpu, tensorrt or openvino. It is ignored when BUILD_OS is android or yocto.
+#gpu, tensorrt or openvino. It is ignored when BUILD_OS is yocto.
 d) BUILD_DEVICE=${OPTARG};;
 #python version: 3.6 3.7 (absence means default 3.6)
 p) PYTHON_VER=${OPTARG};;
@@ -48,13 +52,7 @@ esac
 done
 
 EXIT_CODE=1
-if [ $BUILD_OS = "ubuntu18.04" ]; then
-   DEFAULT_PYTHON_VER="3.6"
-elif [ $BUILD_OS = "ubuntu20.04" ]; then
-   DEFAULT_PYTHON_VER="3.8"
-else
-   DEFAULT_PYTHON_VER="3.6"   
-fi
+DEFAULT_PYTHON_VER="3.8"
 		
 PYTHON_VER=${PYTHON_VER:=$DEFAULT_PYTHON_VER}
 echo "bo=$BUILD_OS bd=$BUILD_DEVICE bdir=$BUILD_DIR pv=$PYTHON_VER bex=$BUILD_EXTR_PAR"
@@ -68,13 +66,7 @@ DOCKER_CMD="docker"
 
 NEED_BUILD_SHARED_LIB=true
 cd $SCRIPT_DIR/docker
-if [ $BUILD_OS = "android" ]; then
-    IMAGE="android"
-    DOCKER_FILE=Dockerfile.ubuntu_for_android
-    $GET_DOCKER_IMAGE_CMD --repository "onnxruntime-$IMAGE" \
-        --docker-build-args="--build-arg BUILD_USER=onnxruntimedev --build-arg BUILD_UID=$(id -u) --build-arg PYTHON_VERSION=${PYTHON_VER}" \
-        --dockerfile $DOCKER_FILE --context .
-elif [ $BUILD_OS = "yocto" ]; then
+if [ $BUILD_OS = "yocto" ]; then
     IMAGE="arm-yocto-$YOCTO_VERSION"
     DOCKER_FILE=Dockerfile.ubuntu_for_arm
     # ACL 19.05 need yocto 4.19
@@ -116,17 +108,7 @@ elif [[ $BUILD_DEVICE = "tensorrt"* ]]; then
             --docker-build-args="--build-arg BUILD_USER=onnxruntimedev --build-arg BUILD_UID=$(id -u) --build-arg PYTHON_VERSION=${PYTHON_VER}" \
             --dockerfile $DOCKER_FILE --context .
 else
-        IMAGE_OS_VERSION=""
-        if [ $BUILD_OS = "ubuntu18.04" ]; then
-           IMAGE_OS_VERSION="18.04"
-           PYTHON_VER="3.6"
-        elif [ $BUILD_OS = "ubuntu20.04" ]; then
-           IMAGE_OS_VERSION="20.04"
-           PYTHON_VER="3.8"
-        else
-           exit 1
-        fi
-        BUILD_ARGS="--build-arg BUILD_USER=onnxruntimedev --build-arg BUILD_UID=$(id -u) --build-arg PYTHON_VERSION=${PYTHON_VER} --build-arg OS_VERSION=${IMAGE_OS_VERSION}"
+        BUILD_ARGS="--build-arg BUILD_USER=onnxruntimedev --build-arg BUILD_UID=$(id -u) --build-arg PYTHON_VERSION=3.8"
         
         if [ $BUILD_DEVICE = "openvino" ]; then
            IMAGE="$BUILD_OS-openvino"
@@ -156,7 +138,7 @@ if [ -z "$NIGHTLY_BUILD" ]; then
     set NIGHTLY_BUILD=0
 fi
 
-if [ $BUILD_DEVICE = "cpu" ] || [ $BUILD_DEVICE = "openvino" ] || [ $BUILD_DEVICE = "nnapi" ] || [ $BUILD_DEVICE = "arm" ]; then
+if [ $BUILD_DEVICE = "cpu" ] || [ $BUILD_DEVICE = "openvino" ] || [ $BUILD_DEVICE = "arm" ]; then
     RUNTIME=
 else
     RUNTIME="--gpus all"