whether "0" having power or "root" having power in linux.

vikilinux · 03-29-2014, 07:21 AM

Dear Friends

As per my knowledge linux machine will work according to "user id".So that only the system assign "0" to the "root" default.In case if i add one user named rhel and i changed the rhel's "user id" and "group id" as "0" and 50x for "Root" by editing /etc/passwd file.Will it give any problem in future,is this recommended or what.

unSpawn · 03-29-2014, 07:42 AM

Quote:

Originally Posted by vikilinux

As per my knowledge linux machine will work according to "user id".So that only the system assign "0" to the "root" default.In case if i add one user named rhel and i changed the rhel's "user id" and "group id" as "0" and 50x for "Root" by editing /etc/passwd file.Will it give any problem in future,is this recommended or what.

Since you are "new to linux platform" as you wrote, you should not do this as 0) it is not standard behaviour (remember root is not a human user) and 1) no other account requires root rights (and if it does see sudo) and 2) because you completely left out the reason for wanting this in the first place. In short: there is no, and you do not have a, valid reason for wanting this.

vikilinux · 03-29-2014, 08:30 AM

ok thank u friend.

So what it means "Super user".Is that root itself Super user?? or can we create a normal user as Super user.
if it is possible pls explain me the steps.

unSpawn · 03-29-2014, 09:56 AM

Quote:

Originally Posted by vikilinux

So what it means "Super user".Is that root itself Super user?? or

Root is the "super user", yes.

Quote:

Originally Posted by vikilinux

can we create a normal user as Super user.

Yes.

Quote:

Originally Posted by vikilinux

if it is possible pls explain me the steps.

You do not require another root user.
Cease pursuing this idea.
It is wrong.

yancek · 03-29-2014, 09:57 AM

Quote:

So what it means "Super user".Is that root itself Super user?

The terms above are generally used interchangeably. Some distributions don't require a super user (root) but have the primary user created during installation given 'root' privileges. Depends upon the distribution of Linux you are using which you neglected to mention.

vikilinux · 03-30-2014, 04:55 AM

Dear friends

Thanks for all of you.
now i understand about root user.

I need this type of support forever.

unSpawn · 03-30-2014, 05:03 AM

Quote:

Originally Posted by vikilinux

I need this type of support forever.

No you don't ;-p You need to read and practice, all there's to it.

sundialsvcs · 03-30-2014, 08:55 PM

The key to "rootly ability" is not that your user-name is root, but that your numeric uuid is zero.

However, do bear in mind that the authentication / authorization systems within Linux (and, other systems ...) have grown very-considerably since the days of the PDP-7. You can now, for example, exercise very fine-grained control over authentication by looking into PAM = Pluggable Authentication Modules. You can specify fine-grained file access control with ACL = Access Control Lists. And you can carry everything many steps above this with SELinux = Security-Enhanced Linux (brought to you in part by #CLASSIFIED#).

chrism01 · 04-01-2014, 05:57 AM

Just because the first (non-root) user in some distros are given unlimited rootly powers doesn't mean there is no root acct in /etc/passwd or that there aren't any files owned by uid 0 ...