sudoers mistake
Michael Havens
bmike1 at gmail.com
Thu Jul 4 21:47:10 MST 2013
I think I have a tiny problem. I ran visudo to remove my user from the
sudoers file and it asked for the password. I removed the user and then:
$ sudo visudo
[sudo] password for bmike1:
bmike1 at PresarioLapTop1:/home$ sudo useradd -G sudo bmike1
useradd: user 'bmike1' already exists
Oh, I was using the wrong file. I need usermod -a -G sudo bmike1
Now we just wait a bit until I can test the handy work to see if it works.
<an hour later>
Nope..... still asks for a password.
:-)~MIKE~(-:
On Thu, Jul 4, 2013 at 8:30 PM, Michael Havens <bmike1 at gmail.com> wrote:
> thanks
>
> :-)~MIKE~(-:
>
>
> On Thu, Jul 4, 2013 at 6:12 PM, Kevin Fries <kevin at fries-biro.com> wrote:
>
>> Remove the entry for you completely from sudoers. Notice in the file
>> you posted the %sudo line? That mean that anybody who belongs to the
>> group sudo has full sudo access. This means you do not need to add
>> individual users to the sudoers file, you just need to add or remove users
>> from that group instead. So remove any individual users from sudoers,
>> it's not needed.
>>
>> Kevin
>> On Jul 4, 2013 5:49 PM, "Michael Havens" <bmike1 at gmail.com> wrote:
>>
>>> regardless, how do I fix sudoers?
>>> :-)~MIKE~(-:
>>>
>>>
>>> On Thu, Jul 4, 2013 at 4:15 PM, Kevin Fries <kevin at fries-biro.com>wrote:
>>>
>>>> Mike,
>>>>
>>>> Leave your sudoers file alone and add your user to the sudo group
>>>> instead. Much more flexible.
>>>>
>>>> Kevin
>>>> On Jul 4, 2013 4:28 PM, "Michael Havens" <bmike1 at gmail.com> wrote:
>>>>
>>>>> I wanted to add my user to the sudoers file so I typed in 'visudo. and
>>>>> put my userid where I figure it should go. Now whenever I type 'sudo <?>'
>>>>> the output of the shell is:
>>>>>
>>>>> bmike1 at PresarioLapTop1:/home$ sudo mkdir /backups
>>>>> sudo: parse error in /etc/sudoers near line 14
>>>>> sudo: no valid sudoers sources found, quitting
>>>>> sudo: unable to initialize policy plugin
>>>>>
>>>>>
>>>>> so I think I'll go in and put it the way it was:
>>>>>
>>>>> bmike1 at PresarioLapTop1:/home$ sudo visudo
>>>>> sudo: parse error in /etc/sudoers near line 14
>>>>> sudo: no valid sudoers sources found, quitting
>>>>> sudo: unable to initialize policy plugin
>>>>>
>>>>> Here is the sudoers file:
>>>>>
>>>>> #
>>>>> # This file MUST be edited with the 'visudo' command as root.
>>>>> #
>>>>> # Please consider adding local content in /etc/sudoers.d/ instead of
>>>>> # directly modifying this file.
>>>>> #
>>>>> # See the man page for details on how to write a sudoers file.
>>>>> #
>>>>> Defaults env_reset
>>>>> Defaults mail_badpass
>>>>> Defaults
>>>>> secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
>>>>>
>>>>> # Host alias specification
>>>>> bmike1
>>>>>
>>>>> # User alias specification
>>>>>
>>>>> # Cmnd alias specification
>>>>>
>>>>> # User privilege specification
>>>>> root ALL=(ALL:ALL) ALL
>>>>>
>>>>> # Members of the admin group may gain root privileges
>>>>> %admin ALL=(ALL) ALL
>>>>>
>>>>> # Allow members of group sudo to execute any command
>>>>> %sudo ALL=(ALL:ALL) ALL
>>>>>
>>>>> # See sudoers(5) for more information on "#include" directives:
>>>>>
>>>>> #includedir /etc/sudoers.d
>>>>>
>>>>> HEY! Look at that. I put my user in the wrong space. I meant to put it
>>>>> under '# User alias specification' but now I see that is wrong; I needed to
>>>>> put it under '# User privilege specification'.
>>>>> Also, what about the "ALL's". What do they mean?
>>>>> Can I fix this with VI? I'm not just doing it because I don't want to
>>>>> mess this up so bad I need to reinstall
>>>>> :-)~MIKE~(-:
>>>>>
>>>>>
>>>>> On Thu, Jul 4, 2013 at 2:56 PM, Michael Havens <bmike1 at gmail.com>wrote:
>>>>>
>>>>>>
>>>>>>> Okay Matt (or anyone else who wants to answer this), could I do this:
>>>>>> first I make a directory in the usb called 'bmike1-backup'
>>>>>>
>>>>>> #!/bin/bash
>>>>>> sudo mkdir /backups <-create backups dir
>>>>>> sudo mount /sdc1/backup-bmike1 /backups <- tell computer to see a
>>>>>> directory in the usb drive as /backups
>>>>>> rsync -av /home/bmike1
>>>>>> sudo umount backups; sudo rmdir backups <-make everything like it was
>>>>>>
>>>>>>
>>>>>>> On Sat, Jun 29, 2013 at 12:45 PM, Matt Graham <
>>>>>>> danceswithcrows at usa.net> wrote:
>>>>>>>
>>>>>>>> 1. Plug this disk in. Usually, removable disks have 1 partition of
>>>>>>>> type FAT32
>>>>>>>> or NTFS covering their whole space. (Check that this is the case,
>>>>>>>> if not,
>>>>>>>> something weird may be going on.)
>>>>>>>>
>>>>>>>> 2. Make a filesystem with a label on this partition. "mke2fs -j -L
>>>>>>>> MY_BACKUPS
>>>>>>>> /dev/sdN1" . Find what N is by looking at the output of dmesg |
>>>>>>>> tail.
>>>>>>>>
>>>>>>>> 3. Make an entry for the partition you made in your /etc/fstab :
>>>>>>>>
>>>>>>>> LABEL=MY_BACKUPS /mnt/backup ext3 noauto,users,noatime 0 0
>>>>>>>>
>>>>>>>> 4. As root, mkdir /mnt/backup if it doesn't exist, then mount this
>>>>>>>> partition
>>>>>>>> on /mnt/backup , mkdir /mnt/backup/USER , and chown USER
>>>>>>>> /mnt/backup/USER .
>>>>>>>>
>>>>>>>> 5. Make a shell script sort of like this:
>>>>>>>>
>>>>>>>> #!/bin/bash
>>>>>>>> if [[ $1 == '--help' || $1 == '-h' ]] ; then
>>>>>>>> echo "backs up ~USER to backup drive."
>>>>>>>> exit;
>>>>>>>> fi
>>>>>>>>
>>>>>>>> if mount | grep /mnt/backup > /dev/null ; then
>>>>>>>> rsync -av --delete-after /home/USER/ /mnt/backup/USER
>>>>>>>> else
>>>>>>>> echo "backup disk not mounted. Trying to mount it."
>>>>>>>> mount /mnt/backup
>>>>>>>> if mount | grep /mnt/backup > /dev/null ; then
>>>>>>>> echo "Is the disk plugged in? Can't mount, bailing."
>>>>>>>> exit 1
>>>>>>>> fi
>>>>>>>> rsync -av --delete-after /home/USER/ /mnt/backup/USER
>>>>>>>> umount /mnt/backup
>>>>>>>> fi
>>>>>>>>
>>>>>>>> 6. Any time you want to make a backup, plug your disk in, and run
>>>>>>>> that shell
>>>>>>>> script. The initial rsync will take some time. Subsequent rsyncs
>>>>>>>> will take a
>>>>>>>> couple of minutes.
>>>>>>>>
>>>>>>>> This is AFAICT a reasonably good way to do things, because it
>>>>>>>> doesn't take a
>>>>>>>> lot of time to keep your backup up to date, and restoring is as
>>>>>>>> simple as
>>>>>>>> mounting the backup disk and copying things over. Since there is
>>>>>>>> only 1
>>>>>>>> backup, though, you could delete something, make a backup, then
>>>>>>>> realize you
>>>>>>>> needed that thing. I have 2 backup disks and rotate them every few
>>>>>>>> days to
>>>>>>>> make that less likely.
>>>>>>>>
>>>>>>>> You could even get fancy and use dm-crypt to back up your stuff to
>>>>>>>> an
>>>>>>>> encrypted disk, which is useful in some situations like when you
>>>>>>>> want to leave
>>>>>>>> the disk somewhere that's not under your direct control like a
>>>>>>>> friend's house.
>>>>>>>> Using dm-crypt makes things a bit more complex, but I can write
>>>>>>>> another
>>>>>>>> message about that.
>>>>>>>>
>>>>>>>> --
>>>>>>>> Matt G / Dances With Crows
>>>>>>>> The Crow202 Blog: http://crow202.org/wordpress/
>>>>>>>> There is no Darkness in Eternity/But only Light too dim for us to
>>>>>>>> see
>>>>>>>>
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>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
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