diff --git a/init_root.sh b/init_root.sh
index 025a11a..223664e 100755
--- a/init_root.sh
+++ b/init_root.sh
@@ -3,6 +3,11 @@
 scriptdir=$(dirname $(realpath $0))
 tempdir="/tmp"
 
+if [[ $EUID -ne 0 ]]; then
+    echo "This script must be run as root."
+    exit 1
+fi
+
 # ============================================================
 
 git_clone() {
@@ -188,7 +193,7 @@ configure_timedate() {
 configure_fail2ban() {
     [ -f /etc/fail2ban/jail.local ] && return
 
-    read -p "要配置 fail2ban 吗？[Y]: " response
+    read -p "要配置 fail2ban 吗？[N]: " response
 
     if [[ $response =~ ^[Yy]$ ]]; then
         apt install fail2ban
@@ -200,10 +205,17 @@ configure_fail2ban() {
     fi
 }
 
-if [[ $EUID -ne 0 ]]; then
-    echo "This script must be run as root."
-    exit 1
-fi
+configure_miniconda() {
+    [ -d ~/.miniconda3 ] && return
+
+    read -p "要安装 miniconda 吗？[N]: " response
+
+    if [[ $response =~ ^[Yy]$ ]]; then
+        wget https://repo.anaconda.com/miniconda/Miniconda3-latest-Linux-x86_64.sh -O $tempdir/miniconda.sh
+        bash $tempdir/miniconda.sh -b -p ~/.miniconda3
+        rm $tempdir/miniconda.sh
+    fi
+}
 
 check_google_access
 configure_ssh
@@ -216,6 +228,7 @@ configure_apt_install
 configure_zsh
 configure_tmux
 configure_iptables
-# configure_hostname
+configure_hostname
 configure_timedate
 configure_fail2ban
+configure_miniconda
diff --git a/init_sudo.sh b/init_sudo.sh
index eb06580..faec0e6 100755
--- a/init_sudo.sh
+++ b/init_sudo.sh
@@ -3,6 +3,16 @@
 scriptdir=$(dirname $(realpath $0))
 tempdir="/tmp"
 
+if [[ $EUID -eq 0 ]]; then
+    echo "This script should not be run as root."
+    exit 1
+fi
+
+if ! sudo -v; then
+    echo "Please get sudo access first."
+    exit 1
+fi
+
 # ============================================================
 
 git_clone() {
@@ -189,7 +199,7 @@ configure_timedate() {
 configure_fail2ban() {
     [ -f /etc/fail2ban/jail.local ] && return
 
-    read -p "要配置 fail2ban 吗？[Y]: " response
+    read -p "要配置 fail2ban 吗？[N]: " response
 
     if [[ $response =~ ^[Yy]$ ]]; then
         sudo apt install fail2ban
@@ -201,10 +211,17 @@ configure_fail2ban() {
     fi
 }
 
-if [[ $EUID -eq 0 ]]; then
-    echo "This script should not be run as root."
-    exit 1
-fi
+configure_miniconda() {
+    [ -d ~/.miniconda3 ] && return
+
+    read -p "要安装 miniconda 吗？[N]: " response
+
+    if [[ $response =~ ^[Yy]$ ]]; then
+        wget https://repo.anaconda.com/miniconda/Miniconda3-latest-Linux-x86_64.sh -O $tempdir/miniconda.sh
+        bash $tempdir/miniconda.sh -b -p ~/.miniconda3
+        rm $tempdir/miniconda.sh
+    fi
+}
 
 check_google_access
 configure_ssh
@@ -217,6 +234,7 @@ configure_apt_install
 configure_zsh
 configure_tmux
 configure_iptables
-# configure_hostname
+configure_hostname
 configure_timedate
 configure_fail2ban
+configure_miniconda