diff --git a/install.sh b/install.sh
index 904d427..01db809 100755
--- a/install.sh
+++ b/install.sh
@@ -3,87 +3,111 @@
 THIS_DIR=$( cd "$( dirname "${BASH_SOURCE[0]:-${(%):-%x}}" )" && pwd )
 source "$THIS_DIR/tools/common.sh"
 
-home_slashes=${HOME//\//\\\/}
-if [[ ! $DOTFILES == ${home_slashes}* ]]; then 
+if [[ ! "$DOTFILES" == "${HOME}"* ]]; then 
     fmt_fatal "\"$DOTFILES\" is not under \"$HOME\". aborting ..."
 fi
-dotfile_home_path=${DOTFILES/${home_slashes}/\~}
-dotfile_relative_path=${DOTFILES#${home_slashes}\/}
-crontab_job="0 * * * * ${DOTFILES}/update.sh"
+DOTFILE_TILDE=${DOTFILES/"$HOME"/\~}
 
-insert_if_not_exist()
-{
-    local filename=$1
-    local line=$2
-    fmt_note "installing \"$line\" into \"$filename\" ..."
-    mkdir -p $(dirname "$filename")
-    if [ ! -f "$filename" ]; then
-        touch $filename
-    fi
-    grep -qxF -- "$line" "$filename" || echo "$line" >> "$filename"
-}
+CRON_JOB="0 * * * * ${DOTFILES}/update.sh"
+declare -a HOME_FILES_PATH
+declare -a HOME_FILES_CONTENT
+HOME_FILES_PATH[0]=".zshrc"
+HOME_FILES_CONTENT[0]="source ${DOTFILE_TILDE}/.zshrc2"
+HOME_FILES_PATH[1]=".tmux.conf"
+HOME_FILES_CONTENT[1]="source-file ${DOTFILE_TILDE}/.tmux.conf2"
+HOME_FILES_PATH[2]=".vimrc"
+HOME_FILES_CONTENT[2]="source ${DOTFILE_TILDE}/.vimrc2"
+HOME_FILES_PATH[3]=".gitconfig"
+HOME_FILES_CONTENT[3]="[include] path = \"${DOTFILE_TILDE}/.gitconfig2\""
 
-delete_if_exist()
-{
-    local filename=$1
-    local line=$2
-    fmt_note "removing \"$line\" from \"$filename\" ..."
-    if [ -f "$filename" ]; then
-        grep -vxF -- "$line" "$filename" | tee "$filename"
-    fi
-}
+declare -a HOME_SYMLINKS_SRC
+declare -a HOME_SYMLINKS_DST
+HOME_SYMLINKS_SRC[0]=".ssh/authorized_keys2"
+HOME_SYMLINKS_DST[0]=".ssh/authorized_keys2"
 
-create_symlink()
+
+install_file_content()
 {
-    local src=$1
-    local dest=$2
-    fmt_note "creating symlink \"$dest\" --> \"$src\" ..."
-    if [ ! -f "$src" ]; then
-        fmt_error "\"$src\" does not exist! aborting this job ..."
-        return 1
-    fi
-    mkdir -p $(dirname "$dest")
-    if [ -f "$dest" ]; then
-        if [ "$(readlink $dest)" -ef "$src" ]; then
-            return 0
+    for ((i=0; i<${#HOME_FILES_PATH[@]}; i++)); do
+        local filename="$HOME/${HOME_FILES_PATH[$i]}"
+        local content=${HOME_FILES_CONTENT[$i]}
+        fmt_note "installing \"$content\" into \"$filename\" ..."
+        mkdir -p $(dirname "$filename")
+        if [ ! -f "$filename" ]; then
+            touch $filename
         fi
-        fmt_warning "\"$dest\" already exists! stat output:"
-        echo ----------
-        stat $dest
-        echo ----------
-        ask_for_yN "would you like to replace ${dest}?"
-        if [ $? -eq 1 ]; then 
-            rm $dest
-        else
-            fmt_error "\"$dest\" already exists! aborting this job ..."
-            return 1
-        fi
-    fi
-    ln -s $src $dest
-    return $?
+        grep -qxF -- "$content" "$filename" || echo "$content" >> "$filename"
+    done
 }
 
-delete_link_if_match()
+uninstall_file_content()
 {
-    local src=$1
-    local dest=$2
-    if [ "$(readlink $dest)" -ef "$src" ]; then
-        fmt_note "removing symlink \"$dest\" ..."
-        echo ----------
-        stat $dest
-        echo ----------
-        rm $dest
-    fi
+    for ((i=0; i<${#HOME_FILES_PATH[@]}; i++)); do
+        local filename="$HOME/${HOME_FILES_PATH[$i]}"
+        local content=${HOME_FILES_CONTENT[$i]}
+        fmt_note "removing \"$content\" from \"$filename\" ..."
+        if [ -f "$filename" ]; then
+            grep -vxF -- "$content" "$filename" | tee "$filename"
+        fi
+    done
+}
+
+install_symlink()
+{
+    for ((i=0; i<${#HOME_SYMLINKS_SRC[@]}; i++)); do
+        local src="$DOTFILES/${HOME_SYMLINKS_SRC[$i]}"
+        local dst="$HOME/${HOME_SYMLINKS_DST[$i]}"
+        fmt_note "creating symlink \"$dst\" --> \"$src\" ..."
+        if [ ! -f "$src" ]; then
+            fmt_error "\"$src\" does not exist! aborting this job ..."
+            continue
+        fi
+        mkdir -p $(dirname "$dst")
+        if [ -f "$dst" ]; then
+            if [ "$(readlink $dst)" -ef "$src" ]; then
+                continue
+            fi
+            fmt_warning "\"$dst\" already exists! stat output:"
+            echo ----------
+            stat $dst
+            echo ----------
+            ask_for_yN "would you like to replace ${dst}?"
+            if [ $? -eq 1 ]; then 
+                rm $dst
+            else
+                fmt_error "aborting this job ..."
+                continue
+            fi
+        fi
+        ln -s $src $dst
+    done
+}
+
+uninstall_symlink()
+{
+    local src
+    for src in "${!HOME_SYMLINKS[@]}"; do
+        local dst=${HOME_SYMLINKS[$src]}
+        src="$DOTFILES/$src"
+        dst="$HOME/$dst"
+        if [ "$(readlink $dst)" -ef "$src" ]; then
+            fmt_note "removing symlink \"$dst\" ..."
+            echo ----------
+            stat $dst
+            echo ----------
+            rm $dst
+        fi
+    done
 }
 
 install_crontab(){
-    fmt_note "installing \"$crontab_job\" to crontab ..."
-    ( crontab -l | grep -vxF "${crontab_job}" | grep -v "no crontab for"; echo "$crontab_job" ) | crontab -
+    fmt_note "installing \"$CRON_JOB\" to crontab ..."
+    ( crontab -l | grep -vxF "${CRON_JOB}" | grep -v "no crontab for"; echo "$CRON_JOB" ) | crontab -
 }
 
 uninstall_crontab(){
-    fmt_note "removing \"$crontab_job\" from crontab ..."
-    ( crontab -l | grep -vxF "$crontab_job" ) | crontab - 
+    fmt_note "removing \"$CRON_JOB\" from crontab ..."
+    ( crontab -l | grep -vxF "$CRON_JOB" ) | crontab - 
 }
 
 install_tmux_tpm(){
@@ -132,11 +156,8 @@ uninstall_update(){
 install(){
     install_update
     install_crontab
-    insert_if_not_exist "${HOME}/.zshrc" "source ${dotfile_home_path}/.zshrc2"
-    insert_if_not_exist "${HOME}/.tmux.conf" "source-file ${dotfile_home_path}/.tmux.conf2"
-    insert_if_not_exist "${HOME}/.vimrc" "source ${dotfile_home_path}/.vimrc2"
-    insert_if_not_exist "${HOME}/.gitconfig" "[include] path = \"${dotfile_home_path}/.gitconfig2\""
-    create_symlink "${DOTFILES}/.ssh/authorized_keys2" "${HOME}/.ssh/authorized_keys2"
+    install_file_content
+    install_symlink
     # those that won't be uninstalled in the future
     install_tmux_tpm
     install_vim_vundle
@@ -145,16 +166,15 @@ install(){
 
 uninstall(){
     ask_for_yN "do you really want to uninstall?"
-    if [[ $? == 1 ]]; then
-        uninstall_update
-        uninstall_crontab
-        delete_if_exist "${HOME}/.zshrc" "source ${dotfile_home_path}/.zshrc2"
-        delete_if_exist "${HOME}/.tmux.conf" "source-file ${dotfile_home_path}/.tmux.conf2"
-        delete_if_exist "${HOME}/.vimrc" "source ${dotfile_home_path}/.vimrc2"
-        delete_if_exist "${HOME}/.gitconfig" "[include] path = \"${dotfile_home_path}/.gitconfig2\""
-        delete_link_if_match "${DOTFILES}/.ssh/authorized_keys2" "${HOME}/.ssh/authorized_keys2"
-        fmt_note "done uninstalling!"
+    if [[ $? != 1 ]]; then
+        fmt_error "aborting this job ..."
+        return
     fi
+    uninstall_update
+    uninstall_crontab
+    uninstall_file_content
+    uninstall_symlink
+    fmt_note "done uninstalling!"
 }