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rhauff
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« on: October 16, 2007, 10:50:52 am » |
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I'm trying to give my user access to the serial port, so I want to add the user to the tty group.
I have tried (as root):
usermod -G tty roland
usermod -a -G tty roland
adduser roland tty
Now in etc/groups I see this line:
tty::5:roland
but still if I run $groups I get only:
roland sys adm disk lp floppy audio video cdrom games scanner users
Any ideas???
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saulgoode
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« Reply #1 on: October 16, 2007, 12:41:40 pm » |
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It is necessary to log out and then back in for group changes to be recognized.
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A complex system that works is invariably found to have evolved from a simple system that works.
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rhauff
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« Reply #2 on: October 17, 2007, 07:29:24 am » |
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I forgot to mention, I had logged out after each attempt. However, today after booting up again, it now shows tty in groups. BUT....., now I only have:
roland tty floppy audio video cdrom
One of the commands must have screwed up my original groups! That explains why I couldn't shutdown as regular user yesterday! Good thing I posted my original groups on here, now at least I know which ones to add back. After thinking about it, one of the commands worked to add my user to the tty group (after logging out & in), but the "groups" command must not have updated until I rebooted.
So, anyway, which was the proper command to add a user to a group without screwing up the existing groups?
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« Last Edit: October 17, 2007, 07:45:23 am by rhauff »
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rbistolfi
Packager
Vectorian
Posts: 2198
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« Reply #3 on: October 17, 2007, 08:13:48 am » |
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the usermod command does not append, you need to put all the groups plus the new group, i.e., if the user is a member of a group which is not listed, will be removed from the group. Should be
usermod -G roland,sys,adm,disk,lp,floppy,audio,video,cdrom,games,scanner,users,tty roland
The list of groups must be separated by a comma with no spaces.
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"There is a concept which corrupts and upsets all others. I refer not to Evil, whose limited realm is that of ethics; I refer to the infinite."
Jorge Luis Borges, Avatars of the Tortoise.
--
Jumalauta!!
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saulgoode
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« Reply #4 on: October 17, 2007, 08:22:44 am » |
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To add user 'rhauff' to the 'tty' group, you could use the following:
usermod -G $(groups rhauff | sed 's/ /,/g'),tty rhauff
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A complex system that works is invariably found to have evolved from a simple system that works.
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rhauff
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« Reply #5 on: October 17, 2007, 08:29:02 am » |
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Thanks very much. It is working, I used usermod -G with the full list of groups. It threw me off yesterday when I checked with the "groups" command and it didn't reflect the change.
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rbistolfi
Packager
Vectorian
Posts: 2198
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« Reply #6 on: October 17, 2007, 09:13:33 am » |
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To add user 'rhauff' to the 'tty' group, you could use the following:
usermod -G $(groups rhauff | sed 's/ /,/g'),tty rhauff
Very cool, thanks |
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Logged
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"There is a concept which corrupts and upsets all others. I refer not to Evil, whose limited realm is that of ethics; I refer to the infinite."
Jorge Luis Borges, Avatars of the Tortoise.
--
Jumalauta!!
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