Nothing assigning a user ID wont do anything, the system will assign the User ID with what ever is avaiable, -r isnt for assigning user id (-r This flag is used to create a system account. That is, a user with a UID lower than the value of UID_MIN defined in /etc/login.defs and whose password does not expire. Note that useradd will not create a home directory for such an user, regardless of the default setting in /etc/login.defs. You have to specify -m option if you want a home directory for a system account to be created. This is an option added by Red Hat.) you should use -u if your looking to assign DI. <div>On 10/18/06, <a href="mailto:redhat-install-list-request@redhat.com">redhat-install-list-request@redhat.com</a> <<a href="mailto:redhat-install-list-request@redhat.com">redhat-install-list-request@redhat.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Send Redhat-install-list mailing list submissions to <a href="mailto:redhat-install-list@redhat.com"> redhat-install-list@redhat.com</a> To subscribe or unsubscribe via the World Wide Web, visit <a href="https://www.redhat.com/mailman/listinfo/redhat-install-list">https://www.redhat.com/mailman/listinfo/redhat-install-list </a> or, via email, send a message with subject or body 'help' to <a href="mailto:redhat-install-list-request@redhat.com">redhat-install-list-request@redhat.com</a> You can reach the person managing the list at <a href="mailto:redhat-install-list-owner@redhat.com">redhat-install-list-owner@redhat.com</a> When replying, please edit your Subject line so it is more specific than "Re: Contents of Redhat-install-list digest..." Today's Topics: 1. Adding Users Command line (Bret Stern) 2. Re: Adding Users Command line (Bob McClure Jr) 3. Re: Adding Users Command line (Rick Stevens) 4. RE: Adding Users Command line (Bret Stern) 5. Problem installing RHEL 4.0 Hitachi SATA 80GB desksta (Naveed) ---------------------------------------------------------------------- Message: 1 Date: Tue, 17 Oct 2006 13:16:14 -0700 From: "Bret Stern" < <a href="mailto:bret_stern@machinemanagement.com">bret_stern@machinemanagement.com</a>> Subject: Adding Users Command line To: <<a href="mailto:redhat-install-list@redhat.com">redhat-install-list@redhat.com</a> > Message-ID: <000001c6f229$18e01f40$6701a8c0@mmbret> Content-Type: text/plain; charset="us-ascii" When adding users from the (command line) useradd has an option -r which assigns a specific user id. Is it common to explicitly assign a user id? What happens if I don't specifically assign a user id? I'm assuming two users cannot have the same user id, so..how would you know the user id's of all your users? Thanks ------------------------------ Message: 2 Date: Tue, 17 Oct 2006 15:27:37 -0500 From: Bob McClure Jr <<a href="mailto:bob@bobcatos.com">bob@bobcatos.com</a>> Subject: Re: Adding Users Command line To: <a href="mailto:redhat-install-list@redhat.com">redhat-install-list@redhat.com</a> Message-ID: <<a href="mailto:20061017202737.GA12080@bobcat.bobcatos.com">20061017202737.GA12080@bobcat.bobcatos.com </a>> Content-Type: text/plain; charset=us-ascii On Tue, Oct 17, 2006 at 01:16:14PM -0700, Bret Stern wrote: > > > When adding users from the (command line) > > useradd > > has an option -r which assigns a specific user id. Nope, that tells it to assign a "system-level" user id number, usually less than 500 or 1000. These are designed for pseudo users assigned to subsystems and processes like mysql, procmail, backup, bin, et al. > Is it common to explicitly assign a user id? Only if you want to make it the same as on another system or to force a duplicated UID. > What happens if I don't specifically assign a user id? It takes the next available UID in the desired range. That's usually figured by taking the highest occupied UID in the range and adding one. > I'm assuming two users cannot have the same user id, > so..how would you know the user id's of all your users? You don't need to, but if you must, look at the third field (delimited by ':') in /etc/passwd. Unless you have some good reason to specify a UID, just let the system assign one. > Thanks Cheers, -- Bob McClure, Jr. Bobcat Open Systems, Inc. <a href="mailto:bob@bobcatos.com">bob@bobcatos.com</a> <a href="http://www.bobcatos.com">http://www.bobcatos.com </a> "Where you go in the hereafter depends on what you were after here." - Thanks to Graffiti, 2 March 2004 ------------------------------ Message: 3 Date: Tue, 17 Oct 2006 15:52:47 -0700 From: Rick Stevens <<a href="mailto:rstevens@vitalstream.com">rstevens@vitalstream.com</a>> Subject: Re: Adding Users Command line To: Getting started with Red Hat Linux <<a href="mailto:redhat-install-list@redhat.com"> redhat-install-list@redhat.com</a>> Message-ID: <<a href="mailto:1161125567.22395.88.camel@prophead.corp.publichost.com">1161125567.22395.88.camel@prophead.corp.publichost.com</a>> Content-Type: text/plain On Tue, 2006-10-17 at 15:27 -0500, Bob McClure Jr wrote: > On Tue, Oct 17, 2006 at 01:16:14PM -0700, Bret Stern wrote: > > > > > > When adding users from the (command line) > > > > useradd > > > > has an option -r which assigns a specific user id. > > Nope, that tells it to assign a "system-level" user id number, usually > less than 500 or 1000. These are designed for pseudo users assigned > to subsystems and processes like mysql, procmail, backup, bin, et al. > > > Is it common to explicitly assign a user id? > > Only if you want to make it the same as on another system or to force > a duplicated UID. Or if you relegate ranges of UIDs to specific types of users. > > What happens if I don't specifically assign a user id? > > It takes the next available UID in the desired range. That's usually > figured by taking the highest occupied UID in the range and adding > one. The values used are given in /etc/login.defs. By default, RH/FC use user and group IDs beginning at 500 and ending at 60,000. > > I'm assuming two users cannot have the same user id, > > so..how would you know the user id's of all your users? Well, all files use the UID and GID _numbers_, not names. You could have two users, "barney" and "fred" that both have UID 500. They both own the file. When you do an "ls -l", the FIRST name in the /etc/passwd file with that UID will be shown as the owner. Remember that the the usernames are only important for login. File ownership, permissions, ACLs and the lot are determined by UID and GID numbers, not the names associated with them. > You don't need to, but if you must, look at the third field (delimited > by ':') in /etc/passwd. Unless you have some good reason to specify a > UID, just let the system assign one. If you want to see the user names and their UIDs, as root: # cut -d":" -f1,3 /etc/passwd But as Bobcat says, you really don't need to do this. Let the system sort it out. It's much less likely to make a boo-boo. ---------------------------------------------------------------------- - Rick Stevens, Senior Systems Engineer <a href="mailto:rstevens@vitalstream.com">rstevens@vitalstream.com</a> - - VitalStream, Inc. <a href="http://www.vitalstream.com">http://www.vitalstream.com</a> - - - - Veni, Vidi, VISA: I came, I saw, I did a little shopping. - ---------------------------------------------------------------------- ------------------------------ Message: 4 Date: Tue, 17 Oct 2006 17:59:27 -0700 From: "Bret Stern" <<a href="mailto:bret_stern@machinemanagement.com"> bret_stern@machinemanagement.com</a>> Subject: RE: Adding Users Command line To: "'Getting started with Red Hat Linux'" <<a href="mailto:redhat-install-list@redhat.com">redhat-install-list@redhat.com </a>> Message-ID: <001401c6f250$a92f6980$6701a8c0@mmbret> Content-Type: text/plain; charset="us-ascii" > -----Original Message----- > From: <a href="mailto:redhat-install-list-bounces@redhat.com"> redhat-install-list-bounces@redhat.com</a> > [mailto:<a href="mailto:redhat-install-list-bounces@redhat.com">redhat-install-list-bounces@redhat.com</a>] On Behalf Of > Bob McClure Jr > Sent: Tuesday, October 17, 2006 1:28 PM > To: <a href="mailto:redhat-install-list@redhat.com">redhat-install-list@redhat.com</a> > Subject: Re: Adding Users Command line > > On Tue, Oct 17, 2006 at 01:16:14PM -0700, Bret Stern wrote: > > > > > > When adding users from the (command line) > > > > useradd > > > > has an option -r which assigns a specific user id. > > Nope, that tells it to assign a "system-level" user id number, usually > less than 500 or 1000. These are designed for pseudo users assigned > to subsystems and processes like mysql, procmail, backup, bin, et al. > > > Is it common to explicitly assign a user id? > > Only if you want to make it the same as on another system or to force > a duplicated UID. > > > What happens if I don't specifically assign a user id? > > It takes the next available UID in the desired range. That's usually > figured by taking the highest occupied UID in the range and adding > one. > > > I'm assuming two users cannot have the same user id, > > so..how would you know the user id's of all your users? > > You don't need to, but if you must, look at the third field (delimited > by ':') in /etc/passwd. Unless you have some good reason to specify a > UID, just let the system assign one. > > > Thanks > > Cheers, > -- > Bob McClure, Jr. Bobcat Open Systems, Inc. > <a href="mailto:bob@bobcatos.com">bob@bobcatos.com</a> <a href="http://www.bobcatos.com"> http://www.bobcatos.com</a> > "Where you go in the hereafter depends on what you were after here." > - Thanks to Graffiti, 2 March 2004 > > _______________________________________________ > Redhat-install-list mailing list > <a href="mailto:Redhat-install-list@redhat.com">Redhat-install-list@redhat.com</a> > <a href="https://www.redhat.com/mailman/listinfo/redhat-install-list">https://www.redhat.com/mailman/listinfo/redhat-install-list </a> > To Unsubscribe Go To ABOVE URL or send a message to: > <a href="mailto:redhat-install-list-request@redhat.com">redhat-install-list-request@redhat.com</a> > Subject: unsubscribe > Thanks for the explanations. I'll look in my programming library for examples of using a user id for processing needs. But for my typical users needs, it's crystal clear now. Again, cheers ------------------------------ Message: 5 Date: Wed, 18 Oct 2006 02:32:30 -0700 (PDT) From: Naveed <<a href="mailto:humour_guy_in@yahoo.com">humour_guy_in@yahoo.com</a>> Subject: Problem installing RHEL 4.0 Hitachi SATA 80GB desksta To: <a href="mailto:redhat-install-list@redhat.com">redhat-install-list@redhat.com</a> Message-ID: <<a href="mailto:20061018093230.10903.qmail@web52007.mail.yahoo.com">20061018093230.10903.qmail@web52007.mail.yahoo.com </a>> Content-Type: text/plain; charset="iso-8859-1" I am trying to install RHEL 4 , but my SATA Disk driver is not detected. I am using ASUS P5WDG2 WS and Hitachi deskstar 80gb Sata disk. I tried installing with every possible change in bios. 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