# Does "system:serviceaccounts:abc" group name have special meaning?

**URL:** <https://discuss.kubernetes.io/t/does-systemabc-group-name-have-special-meaning/18026>\
**Category:** General Discussions\
**Tags:** security\
**Created:** [November 9, 2021, 8:12am UTC](https://discuss.kubernetes.io/t/does-systemabc-group-name-have-special-meaning/18026 "2021-11-09T08:12:14Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![davidshen84](https://sea2.discourse-cdn.com/flex016/user_avatar/discuss.kubernetes.io/davidshen84/32/8072_2.png) [@davidshen84](https://discuss.kubernetes.io/u/davidshen84)\
**Post date:** [November 9, 2021, 8:12am UTC](https://discuss.kubernetes.io/t/does-systemabc-group-name-have-special-meaning/18026/1 "2021-11-09T08:12:14Z")

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Hi,

If I have a namespace called `abc` and I want to create some role binding, does the group name `system:serviceaccounts:abc` have special meaning? I saw people using it, but could not find any reference.

If I want to create a role binding for all service accounts in a namespace, I can use the `system:serviceaccounts` group name, right?

Thanks,

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<div class="post-metadata">

**Author:** ![Mark\_Kharitonov](https://sea2.discourse-cdn.com/flex016/user_avatar/discuss.kubernetes.io/mark_kharitonov/32/10172_2.png) [@Mark\_Kharitonov](https://discuss.kubernetes.io/u/Mark_Kharitonov)\
**Post date:** [December 31, 2022, 4:38pm UTC](https://discuss.kubernetes.io/t/does-systemabc-group-name-have-special-meaning/18026/2 "2022-12-31T16:38:41Z")

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Old thread, but still - [Authenticating | Kubernetes](https://kubernetes.io/docs/reference/access-authn-authz/authentication/#service-account-tokens). Quoting:

> Service accounts authenticate with the username `system:serviceaccount:(NAMESPACE):(SERVICEACCOUNT)` , and are assigned to the groups `system:serviceaccounts` and `system:serviceaccounts:(NAMESPACE)`