0. 系统环境

1. 安装 Clang

➜  sudo apt-get update
➜  sudo apt-get install clang libicu-dev
➜  clang --version
Ubuntu clang version 3.4-1ubuntu3 (tags/RELEASE_34/final) (based on LLVM 3.4)
Target: x86_64-pc-linux-gnu
Thread model: posix

2. 确定系统版本

➜  cat /etc/issue
elementary OS Freya \n \l
➜  sudo lsb_release -a
[sudo] password for mintisan: 
No LSB modules are available.
Distributor ID: elementary OS
Description:    elementary OS Freya
Release:    0.3.2
Codename:   freya
➜  uname -r
3.19.0-39-generic
➜

注：elementary OS Freya使用Ubuntu 14.04 LST 版本

3. 下载对应版本的 Swift

Swift 2.2.1

4. 解压到用户目录并添加环境变量

➜  ~ tar xzf swift-2.2.1-RELEASE-ubuntu14.04.tar.gzip ~/bin/swift-2.2.1-RELEASE-ubuntu14.04
➜  ~ export PATH="$PATH:/home/mintisan/bin/swift-2.2.1-RELEASE-ubuntu14.04/usr/bin"

➜  ~ swift --version
Swift version 2.2.1 (swift-2.2.1-RELEASE)
Target: x86_64-unknown-linux-gnu

➜  echo $PATH
/home/mintisan/bin/swift-2.2.1-RELEASE-ubuntu14.04/usr/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games

添加到文件.zshrc，这样重启后就可以默认加上了：