chpasswd:tldr:af8b7

This command is used to change the password of a user in a Unix-like system. Here is an explanation of the different parts of the command:

• printf: It is a shell command used to format and print data.
• "${username}:${new_encrypted_password}": This is the format string passed to printf. ${username} and ${new_encrypted_password} are variables that should contain the username and the new encrypted password respectively. The ${} syntax is used to retrieve the values of these variables.
• |: This is a pipe operator that takes the output of the printf command and passes it as input to the next command.
• sudo: It is used to execute the subsequent command with superuser (root) privileges.
• chpasswd: It is a command used to update user passwords.
• --encrypted: This is an option for chpasswd indicating that the password provided is already encrypted.

Overall, the command takes the username and the new encrypted password, combines them with a : separator, and then passes it through the pipe to the sudo chpasswd --encrypted command to change the password of the specified user.