安装nvm

git clone https://gitee.com/mirrors/nvm.git /root/.nvm

cd /root/.nvm

cat << 'EOF' >> /root/.bashrc
export NVM_DIR="/root/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"
EOF

source /root/.bashrc

nvm -v
nvm install --lts
nvm use --lts