Connecting to your server via Steam
1. Open the Steam client and in the top left click on View > Servers
How to find a player's SteamID
Some games require using a player's SteamID to grant admin permissions, ban a player, and so-on; as such you will need to get their SteamID. You can use a website such as https://steamid.io/ to get their SteamID.
Installing SteamCMD
SteamCMD is the command-line version of the Steam client, essential for installing and updating dedicated game servers. This guide covers installation for both Linux and Windows environments.