Re: [CentOS] preparing to migrating to new system
On Sat, Dec 25, 2010 at 2:36 AM, Benjamin Smith li...@benjamindsmith.com wrote: What is the most sensible or correct way to migrate ALL the users to the new system? Way in the past is was just perhaps copy the /etc/passwd file but I know thats not the case anymore. how do I easily recreate their account names etc... on the new machine. When transitioning mail servers, I've always done this by writing a perl/PHP script to parse the passwd files and create user only passwd/shadow, group, gshadow, etc. files and then append those to the new system. For most recent RH based distros, users start at either 100 or 500, with the lower numbers reserved for system/daemon accounts. Then you can copy over the emails with rsync with the numeric IDs option set and it will all just work. Beware the user nobody, and a lot of carelessly built vendor software that adds a user, but fails to make that user a system user. I just ran into this headlong with the latest NX software from www.nomachine.com. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] preparing to migrating to new system
What is the most sensible or correct way to migrate ALL the users to the new system? Way in the past is was just perhaps copy the /etc/passwd file but I know thats not the case anymore. how do I easily recreate their account names etc... on the new machine. When transitioning mail servers, I've always done this by writing a perl/PHP script to parse the passwd files and create user only passwd/shadow, group, gshadow, etc. files and then append those to the new system. For most recent RH based distros, users start at either 100 or 500, with the lower numbers reserved for system/daemon accounts. Then you can copy over the emails with rsync with the numeric IDs option set and it will all just work. My approach requires some programming knowledge; I don't understand why there isn't a standard set of scripts to use for transitioning mail servers; there may be. Good luck! -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] preparing to migrating to new system
2010/12/22 Rajagopal Swaminathan raju.rajs...@gmail.com: Greetings, On Tue, Dec 21, 2010 at 10:07 PM, Jerry Geis ge...@pagestation.com wrote: hi all, hmm.. scp oldbox:/etc/passwd brand new CentOS 6 Box geewiz:/etc/passwd ditto /etc/gshadow,/etc/groups, /etc/gshadow It's possibly better way only to cppaste normal usernames, not internal daemons and so on. -- Eero ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] preparing to migrating to new system
Greetings, On Wed, Dec 22, 2010 at 10:14 AM, Eero Volotinen eero.voloti...@iki.fi wrote: 2010/12/22 Rajagopal Swaminathan raju.rajs...@gmail.com: scp oldbox:/etc/passwd brand new CentOS 6 Box geewiz:/etc/passwd ditto /etc/gshadow,/etc/groups, /etc/gshadow It's possibly better way only to cppaste normal usernames, not internal daemons and so on. I did not quite understand the phrase internal daemons and so on. Could you elucidate further please... I alluded to the names of four files which matter in the context. Regards, Rajagopal ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] preparing to migrating to new system
On 12/22/10 4:26 AM, Rajagopal Swaminathan wrote: Greetings, On Wed, Dec 22, 2010 at 10:14 AM, Eero Volotineneero.voloti...@iki.fi wrote: 2010/12/22 Rajagopal Swaminathanraju.rajs...@gmail.com: scpoldbox:/etc/passwdbrand new CentOS 6 Box geewiz:/etc/passwd ditto /etc/gshadow,/etc/groups, /etc/gshadow It's possibly better way only to cppaste normal usernames, not internal daemons and so on. I did not quite understand the phrase internal daemons and so on. Could you elucidate further please... I alluded to the names of four files which matter in the context. On CentOS 5, uids up to 500 are reserved for the system and will belong to various installed packages. 501 and up should be the users you installed locally. -- Les Mikesell lesmikes...@gmail.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] preparing to migrating to new system
Rajagopal Swaminathan wrote: Greetings, On Tue, Dec 21, 2010 at 10:07 PM, Jerry Geis ge...@pagestation.com wrote: hi all, hmm.. scp oldbox:/etc/passwd brand new CentOS 6 Box geewiz:/etc/passwd ditto /etc/gshadow,/etc/groups, /etc/gshadow YMMV Regards Rajagopal ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Hi, Be aware that if you are doing this between different releases 4.x to 5.x for instance you stand a good chance of breaking your system as the systems account set up by the installer may well differ between the two releases. It is safer to extract the users that you have added to the system from the password and shadow files and to append the resulting files to the new system's password and shadow files. ChrisG ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] preparing to migrating to new system
hi all, I will be migrating my mail server from centos 4.8 to 6 when its released. Basically its just a number of users with their passwords. Their mail is downloaded to their clients and not stored on the server. What is the most sensible or correct way to migrate ALL the users to the new system? Way in the past is was just perhaps copy the /etc/passwd file but I know thats not the case anymore. how do I easily recreate their account names etc... on the new machine. Thanks, for any advice. Jerry ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] preparing to migrating to new system
2010/12/22 Jerry Geis ge...@pagestation.com: hi all, I will be migrating my mail server from centos 4.8 to 6 when its released. Basically its just a number of users with their passwords. Their mail is downloaded to their clients and not stored on the server. What is the most sensible or correct way to migrate ALL the users to the new system? Way in the past is was just perhaps copy the /etc/passwd file but I know thats not the case anymore. how do I easily recreate their account names etc... on the new machine. cppaste correct entries from passwd and shadow files + copy files? -- Eero ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] preparing to migrating to new system
Greetings, On Tue, Dec 21, 2010 at 10:07 PM, Jerry Geis ge...@pagestation.com wrote: hi all, hmm.. scp oldbox:/etc/passwd brand new CentOS 6 Box geewiz:/etc/passwd ditto /etc/gshadow,/etc/groups, /etc/gshadow YMMV Regards Rajagopal ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
