If you have been working on linux for any amount of time, you would at some time experienced the error:
E212: Can't open file for writing
This means essentially you forgot to include the sudo command before opening the file in question.
There have been a number of solutions to this problem, you can choose the solution that works for you.
Solution 1: Redo all changes but with sudo
This is probably what you do now
:q! sudo !!
You have to re-create all changes that you did prior to remembering that you needed to open the file with sudo. Obviously this is less than ideal. It does however teach you a lesson ;)
Solution 2: Copy to a temp file
This solution is one level better than the above solution, but still is not optimal as it involves a temporary file
:w /tmp/hosts.temp :q! sudo mv /tmp/hosts.temp /etc/hosts
Solution 3: Use tee and sudo
This is the top rated solution on www.commandlinefu.com and involves using tee and sudo:
:w !sudo tee %
This solution does have the advantage that it avoids the temporary file in solution 2, it does however force you to remember a command that is quite complex. Fortunately, there is a solution. First edit your .vimrc file
Append on the end of the file
ca w!! w !sudo tee "%"
Now the next time you edit a file without the correct priviledges, you can simply
Hope this little tutorial helps you out, if you have any other ideas that can help, please leave a comment below