diff --git a/README.md b/README.md
index 7058289..7379ebb 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ My personal configuration files.
 ##### Usage
 
 1. Clone this repository into `~/.dotfiles`
-2. Install Homebrew: https://brew.sh/
-3. Install tools: `brew bundle install`
-4. (Optional) Install more tools: `brew bundle install --file=Brewfile.opt`
+2. Install [Homebrew](https://brew.sh/): `./install-brew.sh`
+3. Install tools: `brew bundle install --file=brew/Brewfile`
+4. (Optional) Install more tools: `brew bundle install --file=brew/Brewfile.opt`
 5. Install everything else, including symlinks: `./install.sh`
diff --git a/.bashrc b/bash/.bashrc
similarity index 100%
rename from .bashrc
rename to bash/.bashrc
diff --git a/Brewfile b/brew/Brewfile
similarity index 100%
rename from Brewfile
rename to brew/Brewfile
diff --git a/Brewfile.opt b/brew/Brewfile.opt
similarity index 100%
rename from Brewfile.opt
rename to brew/Brewfile.opt
diff --git a/fish/config.fish b/fish/config.fish
index dcbba09..5f21de0 100644
--- a/fish/config.fish
+++ b/fish/config.fish
@@ -27,7 +27,6 @@ test -d /sbin           ; and set -x PATH $PATH /sbin
 # Aliases
 alias adventure='emacs -batch -l dunnet'
 alias afk='pmset displaysleepnow'
-alias dnsflush='sudo killall -HUP mDNSResponder'
 alias java8="set -gx JAVA_HOME $JAVA_HOME_8"
 alias java11="set -gx JAVA_HOME $JAVA_HOME_11"
 alias md5sum="md5 -r $argv"
diff --git a/fish/fish_variables b/fish/fish_variables
index 22e8da6..c0f7d7e 100644
--- a/fish/fish_variables
+++ b/fish/fish_variables
@@ -7,7 +7,7 @@ SETUVAR fish_color_autosuggestion:969896
 SETUVAR fish_color_cancel:\x2dr
 SETUVAR fish_color_command:c397d8
 SETUVAR fish_color_comment:e7c547
-SETUVAR fish_color_cwd:yellow
+SETUVAR fish_color_cwd:green
 SETUVAR fish_color_cwd_root:red
 SETUVAR fish_color_end:c397d8
 SETUVAR fish_color_error:d54e53
diff --git a/fish/functions/dns_flush.fish b/fish/functions/dns_flush.fish
new file mode 100644
index 0000000..9d14fbe
--- /dev/null
+++ b/fish/functions/dns_flush.fish
@@ -0,0 +1,8 @@
+function dns_flush
+	switch (uname -s)
+	case Darwin
+		sudo killall -HUP mDNSResponder
+	case '*'
+		echo "Unsupported OS: "(uname -s)
+	end
+end
diff --git a/install-brew.sh b/install-brew.sh
new file mode 100755
index 0000000..460d730
--- /dev/null
+++ b/install-brew.sh
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+# Check if Homebrew is already installed
+if [ -x "$(command -v brew)" ]; then
+	echo "Homebrew is already installed."
+	exit 0
+fi
+
+# Install Homebrew by OS
+case "$(uname -s)" in
+	Darwin)
+		echo "Mac OS"
+		ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
+		;;
+	Linux)
+		echo "Linux"
+		ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Linuxbrew/install/master/install)"
+		;;
+	*)
+		echo "Unsupported OS: $(uname -s)"
+esac
diff --git a/install-symlinks.sh b/install-symlinks.sh
index bb82300..c113d3d 100755
--- a/install-symlinks.sh
+++ b/install-symlinks.sh
@@ -6,7 +6,7 @@ DOTFILES="$HOME/.dotfiles"
 mkdir -p "$HOME/.config"
 
 # Create symlinks, forcing updates
-ln -Fsv "$DOTFILES/.bashrc" "$HOME/.bashrc" # bash does not support XDG config
-ln -Fsv "$DOTFILES/fish"    "$HOME/.config"
-ln -Fsv "$DOTFILES/nvim"    "$HOME/.config"
-ln -Fsv "$DOTFILES/git"     "$HOME/.config"
+ln -Fsv "$DOTFILES/bash/.bashrc" "$HOME/.bashrc" # Bash does not support XDG config
+ln -Fsv "$DOTFILES/fish"         "$HOME/.config"
+ln -Fsv "$DOTFILES/nvim"         "$HOME/.config"
+ln -Fsv "$DOTFILES/git"          "$HOME/.config"