chpasswd

Change the passwords for multiple users by using stdin. More information: https://manned.org/chpasswd.8.

• Change the password for a specific user:
  printf "{{username}}:{{new_password}}" | sudo chpasswd
• Change the passwords for multiple users (The input text must not contain any spaces.):
  printf "{{username_1}}:{{new_password_1}}\n{{username_2}}:{{new_password_2}}" | sudo chpasswd
• Change the password for a specific user, and specify it in encrypted form:
  printf "{{username}}:{{new_encrypted_password}}" | sudo chpasswd --encrypted
• Change the password for a specific user, and use a specific encryption for the stored password:
  printf "{{username}}:{{new_password}}" | sudo chpasswd --crypt-method {{NONE|DES|MD5|SHA256|SHA512}}