# 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.
## SIGS
* [Active SIGs](active-sigs.md)
* [Retired SIGs](retired-sigs.md)
## Setup
* How to [create a SIG](create.md)
## RPM Info
* 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
## Image Info
* How to create a CentOS [image](spin.md)
## Misc Info
* Rules for [dns entries](dns.md) under sig.centos.org
* Using the [CentOS namespace on gitlab.com](gitlab.md)
* How to [join](auth.md) a SIG (authentication)