May 2006 - WLUG - wlug.mailman3.com

Re: [Wlug] Problem with usermod

by Chuck Anderson

On Wed, May 10, 2006 at 02:20:29PM -0400, Jamie Guinan wrote: > But what really struck me was "Wow, what a horrible interface! You > actually have to specify the full list of groups the user already > belongs to, _plus_ the new group?!". Not Fedora's usermod: usermod(8) -G, --groups GROUP1[,GROUP2,...[,GROUPN]]] A list of supplementary groups which the user is also a member of. Each group is separated from the next by a comma, with no intervening whitespace. The groups are subject to the same restrictions as the group given with the -g option. If the user is currently a member of a group which is not listed, the user will be removed from the group. This behaviour can be changed via -a option, which appends user to the current supplementary group list.

May 10, 2006

Re: [Wlug] Problem with usermod

by Jamie Guinan

On Wed, 10 May 2006, Chuck Noyes wrote: > Hi All, > > I'm running ubuntu (brezzy), and I just shot myself in the foot.... > > I went to add my username to a new group, but forgot to include the > other groups that I belong to in the command. The command I used was > 'sudo usermod -G <new-group> <my-username>'. Now I only belong to > <new-group>. That removed my username from the other groups I belonged > to, including the admin group. If its a personal system, I live dangerously, $ su # $EDITOR /etc/group :) But what really struck me was "Wow, what a horrible interface! You actually have to specify the full list of groups the user already belongs to, _plus_ the new group?!". Looking around my SuSE 9.x desktop at work, I found this (which does exactly what you were after), [sudo] groupmod -A <user> <group> On SuSE (9.x anyway) groupmod is part of the pwdutils package. But on gentoo, which I run everywhere else, groupmod is part of the shadow package, and it has a more limited set of options, _not_ including "-A". Although usermod in gentoo/shadow has a "-a" option to prevent it from deleting you from the other groups. Sigh... I'm sticking with $EDITOR. -Jamie

May 10, 2006

Re: [Wlug] Problem with usermod

by Mike Leo

sounds like a liveCD would make short work of this. Boot liveCD, mount / somewhere, re-edit your /somewhere/etc/group file --- Jared Greenwald <greenwaldjared(a)gmail.com> wrote: > sudo :) > > On 5/10/06, Chuck Noyes <vze284qe(a)verizon.net> wrote: > > Unfortunately, I don't have write access to /etc and I don't have read > > access to /etc/gshadow. > > > > cp /etc/group /etc/group.SAVE > > cp: cannot create regular file `/etc/group.SAVE': Permission denied > > > > cat /etc/gshadow > > cat: /etc/gshadow: Permission denied > > > > > > Chuck Anderson wrote: > > > On Wed, May 10, 2006 at 10:24:22AM -0400, Chuck Noyes wrote: > > > > > >>'sudo usermod -G <new-group> <my-username>'. Now I only belong to > > >><new-group>. That removed my username from the other groups I belonged > > >>to, including the admin group. > > >>Is there a way undo what I did? I do have a copy of /etc/group before > > >>the change. > > > > > > > > > /etc/group- should be a backup. Also, you need to restore > > > /etc/gshadow-. I would save a copy of the current files: > > > > > > cp /etc/group /etc/group.SAVE > > > cp /etc/gshadow /etc/gshadow.SAVE > > > > > > Then restore the backups: > > > > > > cp /etc/group- /etc/group > > > cp /etc/gshadow- /etc/gshadow > > > > > > You can check the files for correctness: > > > > > > grpck > > > > > > (likewise with passwd, shadow, pwck) > > > _______________________________________________ > > > Wlug mailing list > > > Wlug(a)mail.wlug.org > > > http://mail.wlug.org/mailman/listinfo/wlug > > > > > _______________________________________________ > > Wlug mailing list > > Wlug(a)mail.wlug.org > > http://mail.wlug.org/mailman/listinfo/wlug > > > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

May 10, 2006

Re: [Wlug] Problem with usermod

by Jared Greenwald

sudo :) On 5/10/06, Chuck Noyes <vze284qe(a)verizon.net> wrote: > Unfortunately, I don't have write access to /etc and I don't have read > access to /etc/gshadow. > > cp /etc/group /etc/group.SAVE > cp: cannot create regular file `/etc/group.SAVE': Permission denied > > cat /etc/gshadow > cat: /etc/gshadow: Permission denied > > > Chuck Anderson wrote: > > On Wed, May 10, 2006 at 10:24:22AM -0400, Chuck Noyes wrote: > > > >>'sudo usermod -G <new-group> <my-username>'. Now I only belong to > >><new-group>. That removed my username from the other groups I belonged > >>to, including the admin group. > >>Is there a way undo what I did? I do have a copy of /etc/group before > >>the change. > > > > > > /etc/group- should be a backup. Also, you need to restore > > /etc/gshadow-. I would save a copy of the current files: > > > > cp /etc/group /etc/group.SAVE > > cp /etc/gshadow /etc/gshadow.SAVE > > > > Then restore the backups: > > > > cp /etc/group- /etc/group > > cp /etc/gshadow- /etc/gshadow > > > > You can check the files for correctness: > > > > grpck > > > > (likewise with passwd, shadow, pwck) > > _______________________________________________ > > Wlug mailing list > > Wlug(a)mail.wlug.org > > http://mail.wlug.org/mailman/listinfo/wlug > > > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

May 10, 2006

Re: [Wlug] Problem with usermod

by Chuck Noyes

Unfortunately, I don't have write access to /etc and I don't have read access to /etc/gshadow. cp /etc/group /etc/group.SAVE cp: cannot create regular file `/etc/group.SAVE': Permission denied cat /etc/gshadow cat: /etc/gshadow: Permission denied Chuck Anderson wrote: > On Wed, May 10, 2006 at 10:24:22AM -0400, Chuck Noyes wrote: > >>'sudo usermod -G <new-group> <my-username>'. Now I only belong to >><new-group>. That removed my username from the other groups I belonged >>to, including the admin group. >>Is there a way undo what I did? I do have a copy of /etc/group before >>the change. > > > /etc/group- should be a backup. Also, you need to restore > /etc/gshadow-. I would save a copy of the current files: > > cp /etc/group /etc/group.SAVE > cp /etc/gshadow /etc/gshadow.SAVE > > Then restore the backups: > > cp /etc/group- /etc/group > cp /etc/gshadow- /etc/gshadow > > You can check the files for correctness: > > grpck > > (likewise with passwd, shadow, pwck) > _______________________________________________ > Wlug mailing list > Wlug(a)mail.wlug.org > http://mail.wlug.org/mailman/listinfo/wlug >

May 10, 2006

Re: [Wlug] Problem with usermod

by Chuck Anderson

On Wed, May 10, 2006 at 10:24:22AM -0400, Chuck Noyes wrote: > 'sudo usermod -G <new-group> <my-username>'. Now I only belong to > <new-group>. That removed my username from the other groups I belonged > to, including the admin group. > Is there a way undo what I did? I do have a copy of /etc/group before > the change. /etc/group- should be a backup. Also, you need to restore /etc/gshadow-. I would save a copy of the current files: cp /etc/group /etc/group.SAVE cp /etc/gshadow /etc/gshadow.SAVE Then restore the backups: cp /etc/group- /etc/group cp /etc/gshadow- /etc/gshadow You can check the files for correctness: grpck (likewise with passwd, shadow, pwck)

May 10, 2006

Problem with usermod

by Chuck Noyes

Hi All, I'm running ubuntu (brezzy), and I just shot myself in the foot.... I went to add my username to a new group, but forgot to include the other groups that I belong to in the command. The command I used was 'sudo usermod -G <new-group> <my-username>'. Now I only belong to <new-group>. That removed my username from the other groups I belonged to, including the admin group. Is there a way undo what I did? I do have a copy of /etc/group before the change. Thanks, -Chuck

May 10, 2006

Reminder: Upcoming WLUG meeting

by Andy Stewart

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 HI everybody, At this month's WLUG meeting, Frank Sweetser is going to give a "chalk talk" about Ruby on Rails. The meeting will take place on Wednesday, May 10th, at 7:00 PM in the Access Grid Room on the WPI campus in Worcester, MA USA. Afterwards, we'll go to the Tech Pizza restaurant for the apres-meeting meeting. See ya later, Andy - -- Andy Stewart, Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFEX9jwHl0iXDssISsRAmS9AJsE5XwQNjTFfeNhFxzOHSH7y8RaYQCfWHo1 fCy7XB56+Qd8BgyLZUTiEkk= =EwN5 -----END PGP SIGNATURE-----

May 8, 2006

Backing Up/Moving Evolution

by Mims Research

Hi Everyone, Is there a utility to back up Evolution? Or how can I move my Evolution folders listed under "On This Computer" from my hard drive to the server upstairs? I save a lot of my email. I need to find a way to move this stuff so I can get a new dual-boot system (windows/linux). I can't even figure out which directory all this Evolution stuff lives in. Are VFolders or IFolders the answer? I haven't tried either of those, but I believe we have those abilities here on our network. As always, thanks for all the help and support you give to this Linux newbie. All my best, Marie

May 8, 2006

USENIX '06 May 30-June 3, Boston

by Andy Stewart

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ====================================================== Register NOW for USENIX '06: the Annual Technical Conference of the USENIX Association at http://www.usenix.org/usenix06/progm USENIX is back in Boston this May 30 through June 3 with the latest research, security breakthroughs, and practical approaches to the questions and problems you wrestle with. You'll also have many opportunities to chat with peers who share your concerns and interests. *** Over 30 tutorials, featuring: o Dan Geer on Measuring Security o Alex Russell on Ajax and Advanced Responsive WebApp Development o AEleen Frisch on Administering Linux in Production Environments o Abe Singer on Building a Logging Infrastructure and Log Analysis for Security o Bill Cheswick on Defense Against the Dark Arts: Repelling the Wily Hacker (See details at http://www.usenix.org/events/usenix06/ training/) *** Three concurrent tracks of Technical Sessions including Invited Talks, a Systems Practice and Experience track, and a Guru track with your favorite academics and industry researchers on such timely topics as: o Greg Brandeau of Pixar on "Why Mr. Incredible and Buzz Lightyear Need Better Tools" (Plenary) o Trevor Blackwell of Anybots on "Real Operating Systems for Real-time Motion Control" o Peiter "Mudge" Zatko of BBN on "Success, Failure, and Alternative Solutions for Network Security" o Matt Welsh of Harvard on "Deploying a Sensor Network on an Active Volcano" (See details at http://www.usenix.org/events/usenix06/tech/ ) *** Keynote by Larry Peterson of Princeton on "Planetlab: Evolution vs. Intelligent Design in Planetary-Scale Infrastructure" *** Works-In-Progress Reports (WIPs) round out a rich week overflowing with presentations, information, and collaboration. Also: don't miss the opportunity to pose your toughest questions to the experts in the Guru Is In Sessions. Mingle with colleagues and leading experts at the Birds-of-a-Feather sessions (BoFs) and at the various evening social events, including a Poster Session & Happy Hour, vendor sessions, and an off-site conference reception. USENIX '06 promises to be an exciting showcase for the latest in innovative research and cutting-edge practices in technology. We look forward to seeing you in Boston in May. - -------------------------------------------------------------- WHAT: USENIX '06 WHEN: May 30 - June 3, 2006 WHERE: Boston, MA: Marriott Hotel Copley Place WHO: Anyone interested in state-of-the-art computing issues WHY: To get to and stay on the leading edge of practical and actionable research and tools HOW: http://www.usenix.org/usenix06/progm - -------------------------------------------------------------- Five or more people registering together get $100 off per person! Early-Bird Registration discounts end May 12 -- register NOW for the best pricing at: http://www.usenix.org/usenix06/progm ====================================================== - -- Andy Stewart, Founder Worcester Linux Users' Group Worcester, MA, USA http://www.wlug.org -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.5 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFEWq+gHl0iXDssISsRAlIwAJ4uIj+ZmWSpPOlOixG4rle4veBX6ACfXCZx 8F4XjsVouazgM0hJ+6vkyVU= =GxWN -----END PGP SIGNATURE-----

May 5, 2006