wget https://nodejs.org/dist/v12.18.3/node-v12.18.3-linux-x64.tar.xz    // 下载
tar xf node-v12.18.3-linux-x64.tar.xz                                   // 解压
cd node-v12.18.3-linux-x64                                              // 进入解压目录

 vim /etc/profile

export PATH=$PATH:/usr/local/node/node-v12.18.3-linux-x64/bin

source profile

[root@ecs-aece etc]# node -v
v12.18.3
[root@ecs-aece etc]# npm -v
6.14.6
[root@ecs-aece etc]#