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How Many Unix Groups Can A User Be A Member Of?

Fresh3 days ago
Mar 15, 202625652 views
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Problem

We've recently run into a situation at a group-happy site where some group memberships are not being picked up. I seem to remember that there is an upper limit to the number of groups that a user can be a member of. While I am specifically interested in modern Linux systems, I also remember that fo…

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Fix for: How Many Unix Groups Can A User Be A Member Of?

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The specific answer seems to be: up to 32 on a modern linux except if you are accessing a file over nfs, in which case it is 16 ...which explains our problem, we've recently crossed the 16-group boundary for some users.

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