diff --git a/sdata/lib/environment-variables.sh b/sdata/lib/environment-variables.sh
index 5344be4c7..9b2a8ce91 100644
--- a/sdata/lib/environment-variables.sh
+++ b/sdata/lib/environment-variables.sh
@@ -5,6 +5,7 @@ XDG_CONFIG_HOME=${XDG_CONFIG_HOME:-$HOME/.config}
 XDG_DATA_HOME=${XDG_DATA_HOME:-$HOME/.local/share}
 XDG_STATE_HOME=${XDG_STATE_HOME:-$HOME/.local/state}
 BACKUP_DIR=${BACKUP_DIR:-$HOME/ii-original-dots-backup}
+INSTALLED_LISTFILE=${INSTALLED_LISTFILE:-$XDG_CONFIG_HOME/illogical-impulse/installed_listfile}
 
 
 STY_RED='\e[31m'
diff --git a/sdata/lib/functions.sh b/sdata/lib/functions.sh
index 54d4c3b73..a79e5256b 100644
--- a/sdata/lib/functions.sh
+++ b/sdata/lib/functions.sh
@@ -415,3 +415,13 @@ function ensure_cmds(){
     install_cmds "${not_found_cmds[@]}"
   fi
 }
+
+function dedup_and_sort_listfile(){
+  if test -f "$1"; then
+    echo "File not found: $1" >&2; return 2
+  else
+    temp="$(mktemp)"
+    sort -u -- "$1" > "$temp"
+    mv -f -- "$temp" "$2"
+  fi
+}
diff --git a/sdata/subcmd-install/3.files-exp.sh b/sdata/subcmd-install/3.files-exp.sh
index e924ef1d5..94567af4c 100644
--- a/sdata/subcmd-install/3.files-exp.sh
+++ b/sdata/subcmd-install/3.files-exp.sh
@@ -217,16 +217,16 @@ for pattern in "${patterns[@]}"; do
   case "$mode" in
     "sync")
       if [[ -d "$from" ]]; then
-        warning_rsync_delete
+        warning_overwrite
         v rsync -av --delete "${excludes[@]}" "$from/" "$to/"
       else
-        warning_rsync_normal
+        warning_overwrite
         # For files, don't use trailing slash and don't use --delete
         v rsync -av "${excludes[@]}" "$from" "$to"
       fi
       ;;
     "soft")
-      warning_rsync_normal
+      warning_overwrite
       if [[ -d "$from" ]]; then
         v rsync -av "${excludes[@]}" "$from/" "$to/"
       else
diff --git a/sdata/subcmd-install/3.files-legacy.sh b/sdata/subcmd-install/3.files-legacy.sh
index ebf549734..6c2d7ddf4 100644
--- a/sdata/subcmd-install/3.files-legacy.sh
+++ b/sdata/subcmd-install/3.files-legacy.sh
@@ -3,7 +3,44 @@
 
 # shellcheck shell=bash
 
-function copy_file_s_t(){
+function gen_firstrun(){
+  x mkdir -p "$(dirname ${FIRSTRUN_FILE})"
+  x mkdir -p "$(dirname ${INSTALLED_LISTFILE})"
+  x touch "${FIRSTRUN_FILE}"
+  realpath -se "${FIRSTRUN_FILE}" >> "${INSTALLED_LISTFILE}"
+}
+cp_file(){
+  # NOTE: This function is only for using in other functions
+  x mkdir -p "$(dirname $2)"
+  x mkdir -p "$(dirname ${INSTALLED_LISTFILE})"
+  x cp -f "$1" "$2"
+  realpath -se "$2" >> "${INSTALLED_LISTFILE}"
+}
+rsync_dir(){
+  # NOTE: This function is only for using in other functions
+  x mkdir -p "$2"
+  x mkdir -p "$(dirname ${INSTALLED_LISTFILE})"
+  local dest="$(realpath -se $2)"
+  rsync -a --out-format='%i %n' "$1"/ "$2"/ | awk -v d="$dest" '$1 ~ /^>/{ sub(/^[^ ]+ /,""); printf d "/" $0 "\n" }' >> "${INSTALLED_LISTFILE}"
+}
+rsync_dir__sync(){
+  # NOTE: This function is only for using in other functions
+  x mkdir -p "$2"
+  x mkdir -p "$(dirname ${INSTALLED_LISTFILE})"
+  local dest="$(realpath -se $2)"
+  rsync -a --delete --out-format='%i %n' "$1"/ "$2"/ | awk -v d="$dest" '$1 ~ /^>/{ sub(/^[^ ]+ /,""); printf d "/" $0 "\n" }' >> "${INSTALLED_LISTFILE}"
+}
+function install_file(){
+  # NOTE: Do not add prefix `v` or `x` when using this function
+  local s=$1
+  local t=$2
+  if [ -f $t ];then
+    warning_overwrite
+  fi
+  v cp_file $s $t
+}
+function install_file__auto_backup(){
+  # NOTE: Do not add prefix `v` or `x` when using this function
   local s=$1
   local t=$2
   if [ -f $t ];then
@@ -11,30 +48,49 @@ function copy_file_s_t(){
     if ${INSTALL_FIRSTRUN};then
       echo -e "${STY_BLUE}[$0]: It seems to be the firstrun.${STY_RST}"
       v mv $t $t.old
-      v cp -f $s $t
+      v cp_file $s $t
     else
       echo -e "${STY_BLUE}[$0]: It seems not a firstrun.${STY_RST}"
-      v cp -f $s $t.new
+      v cp_file $s $t.new
     fi
   else
     echo -e "${STY_GREEN}[$0]: \"$t\" does not exist yet.${STY_RST}"
-    v cp $s $t
+    v cp_file $s $t
   fi
 }
-function copy_dir_s_t(){
+function install_dir(){
+  # NOTE: Do not add prefix `v` or `x` when using this function
+  local s=$1
+  local t=$2
+  if [ -d $t ];then
+    warning_overwrite
+  fi
+  rsync_dir $s $t
+}
+function install_dir__sync(){
+  # NOTE: Do not add prefix `v` or `x` when using this function
+  local s=$1
+  local t=$2
+  if [ -d $t ];then
+    warning_overwrite
+  fi
+  rsync_dir__sync $s $t
+}
+function install_dir__skip_existed(){
+  # NOTE: Do not add prefix `v` or `x` when using this function
   local s=$1
   local t=$2
   if [ -d $t ];then
     echo -e "${STY_BLUE}[$0]: \"$t\" already exists, will not do anything.${STY_RST}"
   else
     echo -e "${STY_YELLOW}[$0]: \"$t\" does not exist yet.${STY_RST}"
-    v rsync -av --delete $s/ $t/
+    v rsync_dir $s $t
   fi
 }
 
 #####################################################################################
 # In case some dirs does not exists
-v mkdir -p $XDG_BIN_HOME $XDG_CACHE_HOME $XDG_CONFIG_HOME $XDG_DATA_HOME/icons
+v mkdir -p $XDG_BIN_HOME $XDG_CACHE_HOME $XDG_CONFIG_HOME $XDG_DATA_HOME
 
 case "${INSTALL_FIRSTRUN}" in
   # When specify --firstrun
@@ -60,11 +116,11 @@ case "${SKIP_MISCCONF}" in
     for i in $(find dots/.config/ -mindepth 1 -maxdepth 1 ! -name 'quickshell' ! -name 'fish' ! -name 'hypr' ! -name 'fontconfig' -exec basename {} \;); do
 #      i="dots/.config/$i"
       echo "[$0]: Found target: dots/.config/$i"
-      if [ -d "dots/.config/$i" ];then warning_rsync_delete; v rsync -av --delete "dots/.config/$i/" "$XDG_CONFIG_HOME/$i/"
-      elif [ -f "dots/.config/$i" ];then warning_rsync_normal; v rsync -av "dots/.config/$i" "$XDG_CONFIG_HOME/$i"
+      if [ -d "dots/.config/$i" ];then install_dir__sync "dots/.config/$i" "$XDG_CONFIG_HOME/$i"
+      elif [ -f "dots/.config/$i" ];then install_file "dots/.config/$i" "$XDG_CONFIG_HOME/$i"
       fi
     done
-    warning_rsync_delete; v rsync -av "dots/.local/share/konsole/" "${XDG_DATA_HOME:-$HOME/.local/share}"/konsole/
+    install_dir "dots/.local/share/konsole" "${XDG_DATA_HOME:-$HOME/.local/share}"/konsole
     ;;
 esac
 
@@ -72,14 +128,14 @@ case "${SKIP_QUICKSHELL}" in
   true) sleep 0;;
   *)
      # Should overwriting the whole directory not only ~/.config/quickshell/ii/ cuz https://github.com/end-4/dots-hyprland/issues/2294#issuecomment-3448671064
-    warning_rsync_delete; v rsync -av --delete dots/.config/quickshell/ "$XDG_CONFIG_HOME"/quickshell/
+    install_dir__sync dots/.config/quickshell "$XDG_CONFIG_HOME"/quickshell
     ;;
 esac
 
 case "${SKIP_FISH}" in
   true) sleep 0;;
   *)
-    warning_rsync_delete; v rsync -av --delete dots/.config/fish/ "$XDG_CONFIG_HOME"/fish/
+    install_dir__sync dots/.config/fish "$XDG_CONFIG_HOME"/fish
     ;;
 esac
 
@@ -87,8 +143,8 @@ case "${SKIP_FONTCONFIG}" in
   true) sleep 0;;
   *)
     case "$FONTSET_DIR_NAME" in
-      "") warning_rsync_delete; v rsync -av --delete dots/.config/fontconfig/ "$XDG_CONFIG_HOME"/fontconfig/ ;;
-      *) warning_rsync_delete; v rsync -av --delete dots-extra/fontsets/$FONTSET_DIR_NAME/ "$XDG_CONFIG_HOME"/fontconfig/ ;;
+      "") install_dir__sync dots/.config/fontconfig "$XDG_CONFIG_HOME"/fontconfig ;;
+      *) install_dir__sync dots-extra/fontsets/$FONTSET_DIR_NAME "$XDG_CONFIG_HOME"/fontconfig ;;
     esac;;
 esac
 
@@ -96,30 +152,26 @@ esac
 case "${SKIP_HYPRLAND}" in
   true) sleep 0;;
   *)
-    if ! [ -d "$XDG_CONFIG_HOME"/hypr ]; then v mkdir -p "$XDG_CONFIG_HOME"/hypr ; fi
-    warning_rsync_delete; v rsync -av --delete dots/.config/hypr/hyprland/ "$XDG_CONFIG_HOME"/hypr/hyprland/
+    install_dir__sync dots/.config/hypr/hyprland "$XDG_CONFIG_HOME"/hypr/hyprland
     for i in hypr{land,lock}.conf {monitors,workspaces}.conf ; do
-      copy_file_s_t "dots/.config/hypr/$i" "${XDG_CONFIG_HOME}/hypr/$i"
+      install_file__auto_backup "dots/.config/hypr/$i" "${XDG_CONFIG_HOME}/hypr/$i"
     done
     for i in hypridle.conf ; do
       if [[ "${INSTALL_VIA_NIX}" == true ]]; then
-        copy_file_s_t "dots-extra/via-nix/$i" "${XDG_CONFIG_HOME}/hypr/$i"
+        install_file__auto_backup "dots-extra/via-nix/$i" "${XDG_CONFIG_HOME}/hypr/$i"
       else
-        copy_file_s_t "dots/.config/hypr/$i" "${XDG_CONFIG_HOME}/hypr/$i"
+        install_file__auto_backup "dots/.config/hypr/$i" "${XDG_CONFIG_HOME}/hypr/$i"
       fi
     done
     if [ "$OS_GROUP_ID" = "fedora" ];then
       v bash -c "printf \"# For fedora to setup polkit\nexec-once = /usr/libexec/kf6/polkit-kde-authentication-agent-1\n\" >> ${XDG_CONFIG_HOME}/hypr/hyprland/execs.conf"
     fi
 
-    copy_dir_s_t "dots/.config/hypr/custom" "${XDG_CONFIG_HOME}/hypr/custom"
+    install_dir__skip_existed "dots/.config/hypr/custom" "${XDG_CONFIG_HOME}/hypr/custom"
     ;;
 esac
-declare -a arg_excludes=()
 
-# some foldes (eg. .local/bin) should be processed separately to avoid `--delete' for rsync,
-# since the files here come from different places, not only about one program.
-# v rsync -av "dots/.local/bin/" "$XDG_BIN_HOME" # No longer needed since scripts are no longer in ~/.local/bin
-v cp -f "dots/.local/share/icons/illogical-impulse.svg" "${XDG_DATA_HOME}"/icons/illogical-impulse.svg
+install_file "dots/.local/share/icons/illogical-impulse.svg" "${XDG_DATA_HOME}"/icons/illogical-impulse.svg
 
-v touch "${FIRSTRUN_FILE}"
+v dedup_and_sort_listfile "${INSTALLED_LISTFILE}" "${INSTALLED_LISTFILE}"
+v gen_firstrun
diff --git a/sdata/subcmd-install/3.files.sh b/sdata/subcmd-install/3.files.sh
index 07ade39f3..33f3e7eeb 100644
--- a/sdata/subcmd-install/3.files.sh
+++ b/sdata/subcmd-install/3.files.sh
@@ -4,15 +4,9 @@ printf "${STY_CYAN}[$0]: 3. Copying config files\n${STY_RST}"
 
 # shellcheck shell=bash
 
-function warning_rsync_delete(){
+function warning_overwrite(){
   printf "${STY_YELLOW}"
-  printf "The command below uses --delete for rsync which overwrites the destination folder.\n"
-  printf "${STY_RST}"
-}
-
-function warning_rsync_normal(){
-  printf "${STY_YELLOW}"
-  printf "The command below uses rsync which overwrites the destination.\n"
+  printf "The command below overwrites the destination.\n"
   printf "${STY_RST}"
 }