Everything that I've read says that the 'su' command will change my Linux user ID but not my identity. Here's what I see:
# id -Z root:staff_r:staff_t # su fred Your default context is fred:sysadm_r:sysadm_t.
Do you want to choose a different one? [n]n $ id -Z fred:sysadm_r:sysadm_t
My identity changed from 'root' to 'fred'. Bug? That seems a pretty fundamental flaw considering that every document that I've read uses 'su' to explain the difference between a user ID and an identity.
By the way, I see the same result whether I use 'su' or 'su -'. I see the same result (a change in identity) whether I su from root to fred or from fred to root.
So which one is right? The documentation or the code?
I can't confirm this:
icon@hagrid:[~]$ id -Z user_u:user_r:user_t icon@hagrid:[~]$ su Password: root@hagrid:[/home/einstein/staff/icon]# id -Z root:sysadm_r:sysadm_t root@hagrid:[/home/einstein/staff/icon]# su - Your default context is root:sysadm_r:sysadm_t.
Do you want to choose a different one? [n] [root@hagrid root]# id -Z root:sysadm_r:sysadm_t [root@hagrid root]# su icon icon@hagrid:[/root]$ id -Z user_u:user_r:user_t icon@hagrid:[/root]$ exit [root@hagrid root]# su - icon icon@hagrid:[~]$ id -Z user_u:user_r:user_t icon@hagrid:[~]$
-icon
