Supplementary groups ? and group? what is the difference?

funnyusa · 06-22-2003, 03:20 PM

Hi all
I don't know what is Supplementary groups and Group. When I check Linuxconf, I see that user of my ftp belong to different Group and same Supplementary groups, what does it mean?
thanks

Mara · 06-22-2003, 04:43 PM

Group is the main group and can be only one. 'Suplementary groups' is a place for all other groups (there's a limit on number of groups for one user, but it's hard to get to it) . There's not big difference.

funnyusa · 06-28-2003, 12:46 AM

so like you said, if their main group is group1, group2,.. but their Suplementary Group is newgroup, and if I point them to folder1, all users have same Suplementray group will be point to same place?

Mara · 06-29-2003, 03:16 PM

What o you mean when you write 'point to some place'? Home directory? Beeing in a group means you can access files/directories with group equal to one of your groups (of course, the permissions may be different, for example when owner has read/write/execute, group can have read/execute and other users may have no access to the file).