npm install -g pm2会报错，这个是怎么回事啊，零度老师。
npm ERR! code EHOSTUNREACH
npm ERR! syscall connect
npm ERR! errno EHOSTUNREACH
npm ERR! request to https://registry.npmjs.org/pm2 failed, reason: connect EHOSTUNREACH 2606:4700::6810:1123:443
npm ERR! A complete log of this run can be found in:
npm ERR! /root/.npm/_logs/2023-02-21T08_05_37_462Z-debug-0.log
