Effective Vs. Real
Unix processes have an effective (EUID, EGID), a real (UID, GID) and a saved (SUID, SGID) ID. Normally these are identical, but in setgid processes they are different.
Read more about this topic: Group Identifier
Famous quotes containing the words effective and/or real:
“Watteau is no less an artist for having painted a fascia board while Sainsbury’s is no less effective a business for producing advertisements which entertain and educate instead of condescending and exploiting.”
—Stephen Bayley (b. 1951)
“Only when we break the mirror and climb into our vision,
only when we are the wind together streaming and singing,
only in the dream we become with our bones for spears,
we are real at last
and wake.”
—Marge Piercy (b. 1936)