ubuntu14.04 - vim configuration questions

Question

Under ubuntu14.04, when operating as root user, there is no ~/.vimrc file in the home directory, so modify the /etc/vim/vimrc file.
An error occurred in source vimrc before modification.

Excuse me, what is this question.
$ cat vimrc

" All system-wide defaults are set in $VIMRUNTIME/debian.vim and sourced by
" the call to :runtime you can find below. If you wish to change any of those
" settings, you should do it in this file (/etc/vim/vimrc), since debian.vim
" will be overwritten everytime an upgrade of the vim packages is performed.
" It is recommended to make changes after sourcing debian. vim since it alters
" the value of the 'compatible' option.

" This line should not be removed as it ensures that various options are
" properly set to work with the Vim-related packages available in Debian.
runtime! debian.vim

" Uncomment the next line to make Vim more Vi-compatible
" NOTE: debian.vim sets 'nocompatible'. Setting 'compatible' changes numerous
" options, so any other options should be set AFTER setting 'compatible'.
"set compatible

" Vim5 and later versions support syntax highlighting. Uncommenting the next
" line enables syntax highlighting by default.
if has("syntax")
syntax on
endif

" If using a dark background within the editing area and syntax highlighting
" turn on this option as well
"set background=dark

" Uncomment the following to have Vim jump to the last position when
" reopening a file
"if has("autocmd")
" au BufReadPost * if line("'"") > ; 1 && line("'"") <= line("$") | exe "normal! g'"" | endif
"endif

" Uncomment the following to have Vim load indentation rules and plugins
" according to the detected filetype.
"if has("autocmd")
" filetype plugin indent on
"endif

" The following are commented out as they cause vim to behave a lot
" differently from regular Vi. They are highly recommended though.
"set showcmd " Show (partial) command in status line.
"set showmatch " Show matching brackets.
"set ignorecase " Do case insensitive matching
"set smartcase " Do smart case matching
"set incsearch " Incremental search
"set autowrite " Automatically save before commands like :next and :make
"set hidden " Hide buffers when they are abandoned
"set mouse=a " Enable mouse usage (all modes)

" Source a global configuration file if available
if filereadable("/etc/vim/vimrc.local")
source /etc/vim/vimrc.local
endif

Is there any problem here?

I now need to add a function that is not complete in PHP.
echo “autocmd FileType php set omnifunc=phpcomplete#CompletePHP”>>vimrc
source vimrc
Now this error occurs, what is the problem?

Answer 1

source is used to configure the current shell environment, vim cannot use the source command. vim will automatically read vimrc after the next startup, and no source is required.

If

~/.vimrc does not exist, you can use touch ~/.vimrc to create it. Vim will automatically read it when it starts.

Answer 2

cat xxxxxx >> /etc/vim/vimrc 

Answer 3

The first time I saw it in the shellsource vimrc
你要做的是在vim里 :source vimrc

Answer 4

It’s okay, don’t root