Ubuntu file readonly problem: W10:Warning:Changing a readonly file solution

Recently, I encountered a strange and let people egg pain problem, borrow other people's words " everyone in the Linux editing files, it is clear that the use of root login, but this supreme authority at the time I was pressed by the string of red error blasphemy W10:Warning:Changing A readonly file ".

The author is also baffled, troubled two days later, finally a flash of inspiration, the miracle solved the problem, that is:

After the modification is complete, use: wq! Force SAVE EXIT!!!!

Who else?

Are you stupid enough to cry? t_t

Ubuntu file readonly problem: W10:Warning:Changing a readonly file solution