# 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)