# CentOS SIG Guide CentOS Special Interest Groups are smaller groups within the CentOS community that focus feature work on or awareness around a topic related to CentOS Linux and CentOS Stream. This guide is for anyone interested in starting, managing, or contributing to a [CentOS Special Interest Group](https://wiki.centos.org/SpecialInterestGroup). You'll find on this (always involving) website best practices for each step in the process, including : * How to [join](auth.md) a SIG * How to [upload sources](git.md) to the lookaside cache * How to start [building](cbs.md) RPM packages or other artifacts * How to [test](ci.md) your packages * How to [push to mirror](delivery.md) network * How to create a CentOS [spin](spin.md) * Rules for [dns entries](dns.md) under sig.centos.org * Using the [CentOS namespace on gitlab.com](gitlab.md)