diff --git a/.gitconfig b/.gitconfig
index b687e43..e1dc271 100644
--- a/.gitconfig
+++ b/.gitconfig
@@ -29,8 +29,6 @@
     smudge = git-lfs smudge -- %f
     process = git-lfs filter-process
     required = true
-[url "git@github.com:"]
-    insteadOf = https://github.com/
 [diff]
     tool = difftastic
     external = difft
diff --git a/ansible/playbook.yaml b/ansible/playbook.yaml
index 8c31f1c..c7a3069 100644
--- a/ansible/playbook.yaml
+++ b/ansible/playbook.yaml
@@ -5,6 +5,7 @@
   roles:
     - init_snap
     - xdg_base_directory
+    - dot_rc
     - system_tools
     - dev_tools
     - fonts
diff --git a/ansible/roles/dot_rc/tasks/_backup_and_symlink.yaml b/ansible/roles/dot_rc/tasks/_backup_and_symlink.yaml
new file mode 100644
index 0000000..b47b220
--- /dev/null
+++ b/ansible/roles/dot_rc/tasks/_backup_and_symlink.yaml
@@ -0,0 +1,20 @@
+- name: backup_and_symlink
+  become: false
+  block:
+    - name: check item exists
+      stat:
+        path: "{{ lookup('env', 'HOME') }}/{{ item }}"
+      register: item_exists
+      changed_when: false
+
+    - name: backup if item exists
+      ansible.builtin.shell: >-
+        mv "{{ lookup('env', 'HOME') }}/{{ item }}" "{{ lookup('env', 'HOME') }}/{{ item }}.bak"
+      when: item_exists.stat.exists and not item_exists.stat.islnk
+
+    - name: create symlink
+      file:
+        src: "{{ (playbook_dir + '/../' + item) | realpath }}"
+        dest: "{{ lookup('env', 'HOME') }}/{{ item }}"
+        state: link
+      when: not item_exists.stat.exists
diff --git a/ansible/roles/dot_rc/tasks/main.yaml b/ansible/roles/dot_rc/tasks/main.yaml
new file mode 100644
index 0000000..c39f161
--- /dev/null
+++ b/ansible/roles/dot_rc/tasks/main.yaml
@@ -0,0 +1,10 @@
+- name: backup and symlink rc files and others
+  include_tasks: _backup_and_symlink.yaml
+  with_items:
+    - .bashrc
+    - .bash_aliases
+    - .profile
+    - .dircolors
+    - .config/rcs
+    - .gitignore
+    - .gitconfig
diff --git a/install.sh b/install.sh
deleted file mode 100755
index 9c4a32a..0000000
--- a/install.sh
+++ /dev/null
@@ -1,81 +0,0 @@
-#!/bin/bash -e
-
-# /home/<user>
-home_dir=`realpath ~`
-
-cur_dir=`pwd`
-
-function create_symlink_f() {
-    file=$1
-    dst_path=$2
-    dst="${home_dir}/${dst_path}"
-    src="${cur_dir}/${file}"
-    if [ ! -L $dst ]; then
-        echo "symlink $dst does not exists."
-        if [ -f $dst ]; then
-            echo "file $dst exists."
-            read -p "Remove and backup file $dst and create a symlink to $src? [Yn]: " yn
-        else
-            read -p "Create a symlink to $src? [Yn]: " yn
-        fi
-        case $yn in
-            "" | [Yy*] )
-                if [ -f $dst ]; then
-                    cp $dst "${dst}.old"
-                    rm -rf "$dst"
-                fi
-                ln -sf "${src}" "${dst}"
-                printf "Created symlink to ${dst}\n"
-                ;;
-            * )
-                echo "Skip."
-                ;;
-        esac
-    else
-        printf "symlink ${src} => ${dst} already exists, skipping.\n"
-    fi
-}
-
-function create_symlink_d() {
-    dir=$1
-    dst_dir=$2
-    dst="${home_dir}/${dst_dir}"
-    src="${cur_dir}/${dir}"
-    if [ ! -L $dst ]; then
-        echo "symlink $dst does not exists."
-        if [ -d $dst ]; then
-            echo "directory $dst exists."
-            read -p "Remove and backup directory $dst and create a symlink to $src? [Yn]: " yn
-        else
-            read -p "Create a symlink to $src? [Yn]: " yn
-        fi
-        case $yn in
-            "" | [Yy*] )
-                if [ -d $dst ]; then
-                    cp -r $dst "${dst}.old"
-                    rm -rf "$dst"
-                fi
-                ln -s "${src}" "${dst}"
-                printf "Created symlink to ${dst}\n"
-                ;;
-            * )
-                echo "Skip."
-                ;;
-        esac
-    else
-        printf "symlink ${src} => ${dst} already exists, skipping.\n"
-    fi
-}
-
-# system, bash
-create_symlink_f ".bashrc" ".bashrc"
-create_symlink_f ".bash_aliases" ".bash_aliases"
-create_symlink_f ".profile" ".profile"
-create_symlink_f ".dircolors" ".dircolors"
-
-# .rc files
-create_symlink_d ".config/rcs" ".config/rcs"
-
-# git
-create_symlink_f ".gitignore" ".gitignore"
-create_symlink_f ".gitconfig" ".gitconfig"
diff --git a/uninstall.sh b/uninstall.sh
deleted file mode 100755
index 0094cd4..0000000
--- a/uninstall.sh
+++ /dev/null
@@ -1,39 +0,0 @@
-#!/bin/bash -e
-
-function unlink_symlink() {
-    path=$1
-    if [ -L $path ]; then
-        local question="Are you sure to unlink $path ? [Yn]: "
-        read -p "$question" yn
-        case $yn in
-            [Yy*] )
-                unlink $path
-                printf "Unlinked $path\n\n"
-                ;;
-            [Nn*] )
-                printf "Skip\n\n"
-                ;;
-            * )
-                printf "Please enter yes or no\n\n"
-                ;;
-        esac
-    fi
-}
-
-home_path=`realpath ~`
-
-unlink_symlink "${home_path}/.bashrc"
-unlink_symlink "${home_path}/.bash_aliases"
-unlink_symlink "${home_path}/.profile"
-unlink_symlink "${home_path}/.dircolors"
-
-unlink_symlink "${home_path}/.config/fish"
-
-unlink_symlink "${home_path}/.gitignore"
-unlink_symlink "${home_path}/.gitconfig"
-
-unlink_symlink "${home_path}/.emacs"
-unlink_symlink "${home_path}/.emacs.d"
-
-unlink_symlink "${home_path}/.tmux.conf"
-unlink_symlink "${home_path}/.config/tmux"