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When I SSH into my ubuntu server on EC2 in Amazon Web Services, and I change to the root user using sudo su, I navigte to /etc/apache2/sites-available to make changes to the 000-default.conf file there. This was working just fine, but when I nano in (using nano 000-default.conf), I am seeing just a blank page in the terminal.

When I do the same thing as just the ubuntu default user (not root), I see the file fine. This just changed after I made a change to the file as the root user. I can't make any more changes as the default user (it needs to be root for the permissions). Any idea why this is happening? Thank you.

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closed as too broad by Stephen Ostermiller Jan 6 at 18:14

There are either too many possible answers, or good answers would be too long for this format. Please add details to narrow the answer set or to isolate an issue that can be answered in a few paragraphs.If this question can be reworded to fit the rules in the help center, please edit the question.

    
Check the file ownership and permissions. –  closetnoc Mar 23 '14 at 23:43
    
no matter what the permissions are you should always be able to edit a file as root. –  edvinas.me Mar 24 '14 at 8:41
    
Are you typing the file name wrong when using sudo? If I use sudo nano 0000-default.conf I get a blank screen (note the extra zero in the filename). –  Stephen Ostermiller Jul 22 '14 at 19:38
    
See this post: Is there a difference between sudo su - root and sudo -u root -H /bin/bash? It has been my practice to never use both together as the shell can't keep track of the environment variables in some cases. –  eyoung100 Jul 22 '14 at 20:08
    
So then another possibility is that your /root/.bash_profile or /root/.bashrc is changing the working directory. In that case you are not editing a file in the current directory anymore with sudo. Try with a full path to the file: sudo nano /etc/apache2/sites-available/000-default.conf –  Stephen Ostermiller Jul 22 '14 at 20:16