Can't use sudo on ubuntu

Posted by martin.malek on Super User See other posts from Super User or by martin.malek
Published on 2010-05-14T18:05:05Z Indexed on 2010/05/14 18:15 UTC
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sudo

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ubuntu

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grub

After update and reboot I get 'user is not in the sudoers file. This incident will be reported.' when trying to call sudo. The problem is that I don't have a GRUB with revovery option. I try to boot from live cd but I'm not able to access the system partition, only the partition with grub. Can I somehow enable the recovery mode in GRUB? Or boot throw the live CD from first hard drive with some option for that?

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