ubuntu默认安装的nodejs版本比较老，要安装到最新的，按以下步骤操作

 

1.　查看官网，获取最新版本号

Node.js

 

就按最新的16.x来

2. 获取地址

先安装curl

sudo apt install curl

获取下载地址

$ curl -sL https://deb.nodesource.com/setup_16.x | sudo -E bash -

安装最新稳定版的指令： 

curl -sL https://deb.nodesource.com/setup_lts.x | sudo -E bash -
 

## Installing the NodeSource Node.js 16.x repo...

## Populating apt-get cache...

+ apt-get update
Hit:1 http://mirrors.aliyun.com/ubuntu bionic InRelease
Hit:2 http://mirrors.aliyun.com/ubuntu bionic-security InRelease               
Hit:3 http://mirrors.aliyun.com/ubuntu bionic-updates InRelease                
Hit:4 http://mirrors.aliyun.com/ubuntu bionic-backports InRelease              
Hit:5 http://mirrors.aliyun.com/ubuntu bionic-proposed InRelease               
Hit:6 http://packages.microsoft.com/repos/vscode stable InRelease              
Hit:7 https://dl.google.com/linux/chrome/deb stable InRelease                  
Hit:8 http://ppa.launchpad.net/kicad/kicad-6.0-releases/ubuntu bionic InRelease
Hit:9 https://deb.nodesource.com/node_16.x bionic InRelease                    
Reading package lists... Done                      

## Confirming "bionic" is supported...

+ curl -sLf -o /dev/null 'https://deb.nodesource.com/node_16.x/dists/bionic/Release'

## Adding the NodeSource signing key to your keyring...

+ curl -s https://deb.nodesource.com/gpgkey/nodesource.gpg.key | gpg --dearmor | tee /usr/share/keyrings/nodesource.gpg >/dev/null
gpg: WARNING: unsafe ownership on homedir '/home/hy/.gnupg'

## Creating apt sources list file for the NodeSource Node.js 16.x repo...

+ echo 'deb [signed-by=/usr/share/keyrings/nodesource.gpg] https://deb.nodesource.com/node_16.x bionic main' > /etc/apt/sources.list.d/nodesource.list
+ echo 'deb-src [signed-by=/usr/share/keyrings/nodesource.gpg] https://deb.nodesource.com/node_16.x bionic main' >> /etc/apt/sources.list.d/nodesource.list

## Running `apt-get update` for you...

+ apt-get update
Hit:1 http://mirrors.aliyun.com/ubuntu bionic InRelease
Hit:2 http://packages.microsoft.com/repos/vscode stable InRelease              
Hit:3 http://mirrors.aliyun.com/ubuntu bionic-security InRelease               
Hit:4 http://mirrors.aliyun.com/ubuntu bionic-updates InRelease                
Hit:5 http://mirrors.aliyun.com/ubuntu bionic-backports InRelease              
Hit:6 http://mirrors.aliyun.com/ubuntu bionic-proposed InRelease               
Hit:7 https://dl.google.com/linux/chrome/deb stable InRelease                  
Hit:8 http://ppa.launchpad.net/kicad/kicad-6.0-releases/ubuntu bionic InRelease
Hit:9 https://deb.nodesource.com/node_16.x bionic InRelease                    
Reading package lists... Done                      

## Run `sudo apt-get install -y nodejs` to install Node.js 16.x and npm
## You may also need development tools to build native addons:
     sudo apt-get install gcc g++ make
## To install the Yarn package manager, run:
     curl -sL https://dl.yarnpkg.com/debian/pubkey.gpg | gpg --dearmor | sudo tee /usr/share/keyrings/yarnkey.gpg >/dev/null
     echo "deb [signed-by=/usr/share/keyrings/yarnkey.gpg] https://dl.yarnpkg.com/debian stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
     sudo apt-get update && sudo apt-get install yarn
其实有一堆的提示信息，照办就是

3. 更新安装

sudo apt-get update
sudo apt-get install -y nodejs

 4. 运行检查

$ nodejs
Welcome to Node.js v16.14.2.
Type ".help" for more information.
> 

已是最新版本，搞定！