john:tldr:56103

The command "john --show ${path-to-hashes-txt}" is using a tool called "john the ripper" to obtain the plain text passwords from a file containing hashes. Here's a breakdown of the command:

1. "john" is a popular open-source password cracking tool. It is used to perform attacks on encrypted passwords, such as guessing or brute-forcing the passwords.

2. "--show" is a parameter or option given to the "john" tool that specifies that it should display the plain text passwords if it successfully cracks the hashes.

3. "${path-to-hashes-txt}" represents the path or location of the file containing the hashed passwords. The actual path needs to be replaced with the correct file path. The file mentioned is expected to contain the hashed password values that need to be cracked.

So when you execute the command, "john" will attempt to break the hashed passwords and if it successfully cracks any passwords, it will display the plain text passwords on the console or terminal.