how to generate crypted password for auto install

Question

The instructions for auto install of ubuntu 20.4 talks about an encrypted password  $crypted_pass.
version: 1
identity:
    hostname: hostname
    username: username
    password: $crypted_pass

how do I generate this for any given password? I've tried a straight sha-512 hash but this doesn't work
From these instructions it appears I should get
$6$FhcddHFVZ7ABA4Gi$9l4yURWASWe8xEa1jzI0bacVLvhe3Yn4/G3AnU11K3X0yu/mICVRxfo6tZTB2noKljlIRzjkVZPocdf63MtzC0

for root but the sha-512 hash of root is
99ADC231B045331E514A516B4B7680F588E3823213ABE901738BC3AD67B2F6FCB3C64EFB93D18002588D3CCC1A49EFBAE1CE20CB43DF36B38651F11FA75678E8

steeldriver · Answer

The crypted string that you get will depend on the salt value - to reproduce the one in the example you would need to duplicate its 16-character salt:
$ printf 'root' | openssl passwd -6 -salt 'FhcddHFVZ7ABA4Gi' -stdin
$6$FhcddHFVZ7ABA4Gi$9l4yURWASWe8xEa1jzI0bacVLvhe3Yn4/G3AnU11K3X0yu/mICVRxfo6tZTB2noKljlIRzjkVZPocdf63MtzC0

how to generate crypted password for auto install

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