从这里拷贝
https://github.com/nvm-sh/nvm/blob/v0.40.0/install.sh
粘贴到脚本

vi install_nvm.sh
bash install_nvm.sh

export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion

nvm 换源

vi ~/.nvm/nvm.sh

NVM_NODEJS_ORG_MIRROR="https://npmmirror.com/mirrors/node/"

export NVM_NODEJS_ORG_MIRROR=https://npmmirror.com/mirrors/node/
 

# 或者
nvm npm_mirror https://npmmirror.com/mirrors/npm/
nvm node_mirror https://npmmirror.com/mirrors/node/

npm换源

# 设置
npm config set registry https://registry.npmmirror.com/

# 还原
npm config set registry https://registry.npmjs.org/