Gid
 

Hello!
I'd created one user and his gid i've assign to other user, but still if i'm try to access any directory, i get error permission denied.
eg user rob gid is 555
abd users spike and james gid is 555
but when rob try this command cd /home/spike
it give err permission denied.
i'd applied this permission on spike and james directory
chmod g=u /home/spike and even i'd try out this command also chmod 776 /home/spike
but still i get error

try:
this way the directory is owned by the same group as spike's, rob's and james'.

I would have to see a
to see exactly what the ownerships and permissions were to be sure tho.

You can also make spike rob and james members of the same group while retaining their own primary group. ie:
It's all in the /etc/group file. But that isn't what the file looks like - that's just a visual example.