argon2:tldr:04c95

This command uses the argon2 command-line utility to create a hash of the password using the Argon2 algorithm. Argon2 is a secure and memory-hard password hashing function designed to protect against common password attacks.

Here's a breakdown of the command:

1. echo "${password}": The echo command prints the value of the ${password} variable. It is used to pass the password as input to the argon2 command.

2. |: The pipe symbol | is a special operator in the command-line interface that allows the output of one command to serve as input to another command.

3. argon2 "${salt_text}" -e: This is the argon2 command itself. It takes the password as input from the previous echo command and generates a hash using the specified ${salt_text} as a salt. The -e flag tells argon2 to output the encoded hash value.

The resulting hash can be used to store and compare passwords securely, as it is a one-way function that is computationally expensive to reverse or brute-force. It incorporates both a user-specific password and a random salt, making it more resistant to dictionary and rainbow table attacks.