p4:tldr:16a8c

The command "p4 login -a" is used in Perforce (P4) version control system to login and authenticate a user.

Here is the breakdown of the command:

• "p4" is the command-line interface (CLI) tool for Perforce.
• "login" is the specific command used for logging in to the Perforce server.
• "-a" is an option or flag that is used with the "login" command. In this case, it stands for "all" and indicates that the login operation applies to all users on the server.

When this command is run, it prompts the user to enter their username and password. The specified username and password will be used to authenticate and establish a session with the Perforce server. The "-a" option ensures that the login applies to all users on the server, allowing them to perform operations that require authentication.