title: PM2 EPERM, Operation not permitted on call initgroups
body: <p>I have install pm2 globally
  <code>sudo pm2 install -g</code>
  pm2 start server.js</p>
  
  <p>pm2 status (gives this output)
  ┌──────────┬────┬──────┬───────┬────────┬─────────┬────────┬─────┬───────────┬─────────┬──────────┐
  │ App name │ id │ mode │ pid   │ status │ restart │ uptime │ cpu │ mem       │ user    │ watching │
  ├──────────┼────┼──────┼───────┼────────┼─────────┼────────┼─────┼───────────┼─────────┼──────────┤
  │ server   │ 0  │ fork │ 10094 │ online │ 0       │ 85s    │ 0%  │ 44.7 MB   │ ubuntu │ disabled │
  └──────────┴────┴──────┴───────┴────────┴─────────┴────────┴─────┴───────────┴─────────┴──────────┘</p>
  
  <p>When pm2 log 0
  we get following error</p>
  
  <p>1|server   | 2018-01-23 14:35 +00:00: Tue, 23 Jan 2018 14:35:03 GMT zap2it:server Server now running on localhost:4040</p>
  
  <p>1|server   | 2018-01-23 14:35 +00:00: Tue, 23 Jan 2018 14:35:03 GMT zap2it:server spawning worker #53</p>
  
  <p>1|server   | 2018-01-23 14:35 +00:00: EPERM, Operation not permitted on call initgroups</p>
  
  <p>1|server   | 2018-01-23 14:35 +00:00: ubuntu is not accessible</p>
  
  <p>What permission I need for pm2 to run or where I can look for errors?
  Can I install and run pm2 using root? </p>