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What is the upper limit on the UIDs and GIDs in AIX?

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  • Any particular version in mind?
    – Jeff Schaller
    Aug 22, 2016 at 18:51

1 Answer 1

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From AIX 6.1 onwards, UIDs and GIDs are 32 bits in length, and so max out at 4,294,967,295.

See, for example, http://www.ibm.com/support/knowledgecenter/ssw_aix_61/com.ibm.aix.files/group_security.htm which describes the group entry.

Earlier versions of AIX only supported 16bit IDs and so maxed out at 65,535.

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