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Tried to change user name, now cannot log in

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# 1  
Old 06-29-2016
Tried to change user name, now cannot log in
I have been trying to change my user name and machine name, however now I cannot log in and I am directed as guest. Is there a way to resolve this problem?
# 2  
Old 06-29-2016
I'm afraid you need to call a (the?) sys admin. You are (resp. have been?) the sys admin? Boot into single user mode.
# 3  
Old 06-29-2016
I am the sys admin. I can only log in as guest since my password is not being recognised.

Looking at /etc/passwd I have the entry

Code:
hagbard:x:1000:1000::/home/cdi:/bin/bash

Used to be cdi

Originally had

Code:
cdi:x:1000:1000::/home/cdi:/bin/bash

then changed it to

Code:
cdi:x:1000:1000:hagbard:/home/cdi:/bin/bash

then to

Code:
hagbard:x:1000:1000::/home/cdi:/bin/bash

# 4  
Old 06-29-2016
Looks like you can log in as root. How did you do all those changes? Using what tools, or did you edit passwd manually?
# 5  
Old 06-29-2016
Manually. Also changed name from User Accounts. Played around with usermod as well. How can I get as root? User is now hagbard but cannot accept the password I had for cdi.
# 6  
Old 06-29-2016
How about manually resetting it to cdi:x:1000:1000::/home/cdi:/bin/bash and then use system tools ONLY!? Just guessing you have the shadow suite (or equivalent) installed, which needed to be modified simultaneously, which you missed when tinkering manually and which system tools would include automatically.
# 7  
Old 06-29-2016
I have tried, however running

Code:
sudo gedit /etc/passwd

is giving

Code:
sudo: unable to change to root gid: Operation not permitted
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