diff --git a/bin/install.sh b/bin/install.sh
old mode 100644
new mode 100755
index 0f10909..bf53e3b
--- a/bin/install.sh
+++ b/bin/install.sh
@@ -1,12 +1,22 @@
-#!/usr/bin/fish
+#!/usr/bin/bash
+set -eu
 
-# test working directory
+# =========================================================
+# check executing location
+# =========================================================
+if [ ! -d "bin" -a ! -d "dotfiles" ]; then
+	echo "Wrong execution location"
+	echo "Please run this script on dotfiles root folder."
+	exit 1
+fi
 
 
-# symlink
-#ln -s ~/.config/fish/config.fish dotfiles/fish/config.fish
-cp ~/.config/fish/config.fish (pwd)/dotfiles/fish/config.fish
-ln -sf (pwd)/dotfiles/fish/config.fish ~/.config/fish/config.fish
-ln -sf (pwd)/dotfiles/starship/starship.toml ~/.config/starship.toml
-ln -sf (pwd)/dotfiles/neovim/init.lua ~/.config/nvim/init.lua
-ln -sf (pwd)/dotfiles/neovim/lua/plugins.lua ~/.config/nvim/lua/plugins.lua
+# =========================================================
+# links
+# =========================================================
+ln -sf $(pwd)/dotfiles/fish/config.fish ~/.config/fish/config.fish
+ln -sf $(pwd)/dotfiles/starship/starship.toml ~/.config/starship.toml
+ln -sf $(pwd)/dotfiles/tmux.conf ~/.tmux.conf
+
+ln -sf $(pwd)/dotfiles/neovim/init.lua ~/.config/nvim/init.lua
+ln -sf $(pwd)/dotfiles/neovim/lua/plugins.lua ~/.config/nvim/lua/plugins.lua
\ No newline at end of file
diff --git a/bin/install_ubuntu.sh b/bin/install_ubuntu.sh
new file mode 100644
index 0000000..b11fb91
--- /dev/null
+++ b/bin/install_ubuntu.sh
@@ -0,0 +1,2 @@
+#!/usr/bin/bash -euo
+
diff --git a/dotfiles/fish/config.fish b/dotfiles/fish/config.fish
index 30155a4..590b7dd 100644
--- a/dotfiles/fish/config.fish
+++ b/dotfiles/fish/config.fish
@@ -19,10 +19,29 @@ if status is-interactive
     source ~/.opam/opam-init/init.fish > /dev/null 2> /dev/null; or true
 end
 
+# starship
+starship init fish | source
+
+function set_win_title
+  echo -ne "\033]0; (basename "$PWD") \007"
+end
+set starship_precmd_uesr_func "set_win_title"
+
+# keychain
+set -x SHELL fish
+keychain --eval --quiet -Q id_rsa, id_ed25519 | source
+set -x SHELL bash
+
+# opam
+# source ~/.opam/opam-init/init.fish > /dev/null 2> /dev/null; or true
+opam env --shell fish | source
 
 # key bindings
 bind \b backward-kill-word
 
+
+# env
+set -x LESS '-i -r -M -R -S -W -z-4 -x4'
 # save fish log to my custom file
 set -gx my_fish_history "$HOME/my_fish_history.txt"
 function save_myhistory --on-event fish_prompt -d "Save custom shell log to $my_fish_history"
diff --git a/dotfiles/neovim/init.lua b/dotfiles/neovim/init.lua
index 2b5eea2..4a085fb 100644
--- a/dotfiles/neovim/init.lua
+++ b/dotfiles/neovim/init.lua
@@ -1,3 +1,4 @@
+--print("init.lua loaded")
 -----------------------------------------------------------
 -- basic configurations
 vim.o.number = true