steamcmd:tldr:d1d5e

This command runs the SteamCMD utility and performs several actions:

1. steamcmd starts the SteamCMD utility.

2. +@sSteamCmdForcePlatformType ${windows} sets the platform type to Windows. This is an optional parameter that can be used to enforce the platform type if needed.

3. +login ${anonymous} logs in to the Steam account with the username "anonymous". This is a special account used for public access to certain content and does not require a password.

4. +app_update ${appid} validate updates a specific Steam application with the given appid (application ID). This parameter specifies the particular game or software that you want to update. The validate option ensures that the application is validated and any corrupted files will be reacquired.

5. +quit quits the SteamCMD utility after the previous actions have been completed.

Note: You need to replace ${windows} with the appropriate platform type if you're not running the command on Windows. Similarly, ${anonymous} and ${appid} need to be replaced with the appropriate username and application ID, respectively.