$ curl cheat.sh/

# 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\nusername_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

$

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