> For the complete documentation index, see [llms.txt](https://docs.trilio.io/openstack/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.trilio.io/openstack/upgrading-to-t4o-6.x-from-older-supported-versions.md).

# Upgrading to T4O-6.x from older supported versions

- [Supported Trilio Upgrade Path](https://docs.trilio.io/openstack/upgrading-to-t4o-6.x-from-older-supported-versions/upgrade-triliovault.md)
- [Upgrade Trilio](https://docs.trilio.io/openstack/upgrading-to-t4o-6.x-from-older-supported-versions/upgradetrilio.md)
- [Upgrading on RHOSP](https://docs.trilio.io/openstack/upgrading-to-t4o-6.x-from-older-supported-versions/upgradetrilio/upgrading-on-rhosp.md)
- [Upgrading on RHOSO](https://docs.trilio.io/openstack/upgrading-to-t4o-6.x-from-older-supported-versions/upgradetrilio/upgrade_on_rhoso18.md)
- [Upgrading on OpenStack-Helm/MOSK](https://docs.trilio.io/openstack/upgrading-to-t4o-6.x-from-older-supported-versions/upgradetrilio/upgrading_on_oshelm.md)