The documentation you probably need is here, and is referred to in the English module. The leading E is Effective; U is User and G is Group. ID is the Linux user or group id. The documentation link should tell you what you need to know about the difference between the effective and the real IDs.
In reply to Re: Not understanding the code to drop privileges in perlsec
by talexb
in thread Not understanding the code to drop privileges in perlsec
by Nocturnus
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