安装最新版nodejs
更新ubuntu软件源
sudo apt-get update
sudo apt-get install -y python-software-properties software-properties-common
sudo add-apt-repository ppa:chris-lea/node.js
sudo apt-get update
安装nodejs
sudo apt-get install nodejs
sudo apt install nodejs-legacy
sudo apt install npm
更新npm的包镜像源，方便快速下载
sudo npm config set registry https://registry.npm.taobao.org
sudo npm config list
全局安装n管理器(用于管理nodejs版本)
sudo npm install n -g
安装最新的nodejs（stable版本）
sudo n stable
sudo node -v
QA
Q: apt-get update找不到文件
// error code
W: The repository 'http://ppa.launchpad.net/chris-lea/node.js/ubuntu xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://ppa.launchpad.net/chris-lea/node.js/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
// A: 修改node相关文件：/etc/apt/sources.list.d/chris-lea-ubuntu-node_js-xenial.list
deb http://ppa.launchpad.net/chris-lea/node.js/ubuntu trusty main
deb-src http://ppa.launchpad.net/chris-lea/node.js/ubuntu trusty main
Q: node -v异常
node -v
-bash: /usr/local/bin/node: Permission denied
sudo node -v
Segmentation fault (core dumped)
// A: 重新安装nodejs
手动移除 /usr/local/lib/node_modules整个目录
手动移除 /usr/local/bin/node
手动移除 /usr/local/bin/n
手动移除 /usr/local/bin/npm
ubuntu软件源
修改/etc/apt/sources.list为以下软件源（改前请备份）
163和里面在部分网络下会一直下载失败，可以改回官方源下载
源列表
http://wiki.ubuntu.org.cn/模板:16.04source
Ubuntu官方
deb http://cn.archive.ubuntu.com/ubuntu/ xenial main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ xenial-security main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ xenial-updates main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
deb http://cn.archive.ubuntu.com/ubuntu/ xenial-proposed main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial-security main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial-updates main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://cn.archive.ubuntu.com/ubuntu/ xenial-proposed main restricted universe multiverse
