solana-keygen recover 'prompt:?key=0/0' --outfile ~/.config/solana/id.json
it will ask you for seed phrase like this: Enter your seed phrase here
[recover] seed phrase:
Then you will see this output: Just press enter
[recover] If this seed phrase has an associated passphrase, enter it now. Otherwise, press ENTER to continue:
oooOOOOoooooh: https://forums.solana.com/t/paperwallet-addresses-bad-guide-in-solana-docs/3042