npm install gets stuck at fetchMetadata

Question

I\'m currently unable to run npm install in any project since today. I\'m running node v8.2.1 & npm 5.3.0 (installed via nvm).

When typing npm

Answer 1

1. REASON: the reason for this is: the cli do not prompt: "Enter passphrase for /home/USERS/.ssh/id_rsa:" and I used to get the prompt correctly in npm@5, but update to npm@6, it occurs.
2. SOLVE: # eval `ssh-agent` # ssh-add //automaticlly enter passphrase, without maunally operating.