diff --git a/cuda/Dockerfile b/cuda/Dockerfile
index a8b3fb8..6a05b17 100644
--- a/cuda/Dockerfile
+++ b/cuda/Dockerfile
@@ -3,28 +3,30 @@ FROM docker.io/nvidia/cuda:11.8.0-devel-ubuntu22.04
 ARG APT_MIRROR=https://mirrors.bfsu.edu.cn
 ARG ROOT_PASSWD=miao
 
-RUN \
-    env | grep -E -e '^NVIDIA' -e '^NV_' -e '^NVARCH' -e '^NCCL_' | \
-        sed -E 's/=(.*)/="\1"/' > \
-        /etc/profile.d/00-nvidia.sh && \
-    echo "PATH=/usr/local/nvidia/bin:/usr/local/cuda/bin:\${PATH}" >> /etc/profile.d/00-nvidia.sh && \
-    echo "LD_LIBRARY_PATH=/usr/local/nvidia/lib:/usr/local/nvidia/lib64" >> /etc/profile.d/00-nvidia.sh && \
-    echo "LIBRARY_PATH=/usr/local/cuda/lib64/stubs" >> /etc/profile.d/00-nvidia.sh && \
-    sed -i 's/^/export /' /etc/profile.d/00-nvidia.sh && \
+RUN true \
+    &&  env | grep -E -e '^NVIDIA' -e '^NV_' -e '^NVARCH' -e '^NCCL_' | \
+            sed -E 's/=(.*)/="\1"/' > \
+            /etc/profile.d/00-nvidia.sh \
+    &&  echo "PATH=/usr/local/nvidia/bin:/usr/local/cuda/bin:\${PATH}" >> /etc/profile.d/00-nvidia.sh \
+    &&  echo "LD_LIBRARY_PATH=/usr/local/nvidia/lib:/usr/local/nvidia/lib64" >> /etc/profile.d/00-nvidia.sh \
+    &&  echo "LIBRARY_PATH=/usr/local/cuda/lib64/stubs" >> /etc/profile.d/00-nvidia.sh \
+    &&  sed -i 's/^/export /' /etc/profile.d/00-nvidia.sh \
     \
-    sed -i "s#http://archive.ubuntu.com#${APT_MIRROR}#g" /etc/apt/sources.list && \
-    sed -i "s#http://security.ubuntu.com#${APT_MIRROR}#g" /etc/apt/sources.list && \
+    &&  sed -i "s#http://archive.ubuntu.com#${APT_MIRROR}#g" /etc/apt/sources.list \
+    &&  sed -i "s#http://security.ubuntu.com#${APT_MIRROR}#g" /etc/apt/sources.list \
     \
-    echo root:${ROOT_PASSWD} | chpasswd && \
+    &&  echo root:${ROOT_PASSWD} | chpasswd \
     \
-    apt update && \
-    apt install --yes ssh tini file neovim git && \
-    apt clean && \
-    rm -rf /var/lib/apt/lists/* && \
+    &&  apt update \
+    &&  apt install --yes ssh tini zsh netcat file neovim git \
+    &&  apt clean \
+    &&  rm -rf /var/lib/apt/lists/* \
     \
-    mkdir /run/sshd && \
-    sed -i 's/#PermitRootLogin.*$/PermitRootLogin yes/' /etc/ssh/sshd_config && \
-    sed -i 's#SSHD_OPTS=#SSHD_OPTS=""#' /etc/default/ssh
+    &&  usermod --shell /usr/bin/zsh root \
+    \
+    &&  mkdir /run/sshd \
+    &&  sed -i 's/#PermitRootLogin.*$/PermitRootLogin yes/' /etc/ssh/sshd_config \
+    &&  sed -i 's#SSHD_OPTS=#SSHD_OPTS=""#' /etc/default/ssh
 
 ENTRYPOINT [ "/usr/bin/tini", "--" ]
 CMD [ "/usr/sbin/sshd", "-D" ]