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Ubuntu 11.04 upgrade sudo authentication failure

Asked by Phallmaster

After upgrading from 10.10. to 11.04 I have found that my sudo password doesn't work. I have always used the same password for my login so I know it. I can login fine but cant authenticate anything. I also cannot log into root or recovery mode. It is reporting that my user account is a member of admin. If I try and change my user password I get authentication manipulation token error. This was all working fine prior to me upgrading to 11.04.

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Phallmaster
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actionparsnip (andrew-woodhead666) said : 		#1

When you reset the password, did you do it ni root recovery mode?

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Anthony Harrington (linuxchemist) said : 		#2

http://www.psychocats.net/ubuntu/resetpassword is my best advice. Reset the root password - it won't ask for logins to do so and the instructions on that site are incredibly clear ;) Good luck.

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Phallmaster (phallmaster) said : 		#3

Still no luck, got into recovery mode and set root password. Edited sudoers file to include myusername ALL=(ALL) ALL. Still not working. Checked groups - and I am admin. Changed my password too.
Everytime I sudo and enter my password it says sorry try again - it is alway wrong and I don't know why? This has happened after the upgrade something has screwed my password.

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Phallmaster (phallmaster) said : 		#4

Also in recovery mode : added my username to groups sudo and root and reset my password.
Sudo still reporting my password is incorrect in normal mode!

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actionparsnip (andrew-woodhead666) said : 		#5

You need to be in the admin group

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Phallmaster (phallmaster) said : 		#6

I am already in the admin group.

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Manfred Hampl (m-hampl) said : 		#7

What is the exact error message?
Please open a terminal and issue the following commands:

id
sudo id

Then copy all output and paste it into a new message of this question thread.

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Phallmaster (phallmaster) said : 		#8

phallmaster@MSI:~$ id
uid=1000(phallmaster) gid=1000(phallmaster) groups=1000(phallmaster),0(root),4(adm),20(dialout),24(cdrom),25(floppy),27(sudo),29(audio),46(plugdev),111(lpadmin),119(admin),122(sambashare)

I can't do sudo id - but if I do it in recovery mode I get:

uid=0(root) gid=0(root) groups=0(root)

I have now lost wireless internet connection as asking for authentication and it won't accept my password.
I added a new user "temp" and assigned to admin and wireless won't work there either, plus it doesn't work on root login.
I am replying on another computer now.

If it's knackered is there an easy way to remove 11.04 and revert back 10.04 as I am not liking version 11!

Thanks for help so far...

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Manfred Hampl (m-hampl) said : 		#9

I know that you can't sudo, but I asked you to try to do "sudo id" to see what exactly shows up on your screen when you try.

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Phallmaster (phallmaster) said : 		#10

sudo id asks for my password, which I enter and then it says sorry try again, after 3 attempts it comes up with 3 bad attempts message.

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Manfred Hampl (m-hampl) said : 		#11

Can you please issue the following command and copy/paste the output

tail /var/log/auth/log

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Phallmaster (phallmaster) said : 		#12

I cant believe it but it's now working, I know for a fact the sudoers file was incorrect - caused by upgrade but after fixing it I still had the same problem. I then decided to install 10.10 using live cd but before installign it asked for keyring password for internet and connected. I then rebooted chose ubuntu classic from login screen and now everything works!?
Thanks for you help - I'm closing this one now....