设置vim为默认编辑器，配置vim语法高亮

1. 设置vim为默认编辑器

1> 安装vim

[root@localhost ~]# yum install -y vim

2> 在/etc/profile文件中将vim设置别名

[root@localhost ~]# echo "alias vi=vim" >> /etc/profile

3> 确认/etc/profile添加了别名

[root@localhost ~]# tail -l /etc/profile

unset i
unset -f pathmunge
export JAVA_HOME=/usr/java/jdk-13.0.1
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:$HOMR/bin

PATH=$PATH:/new/test/bin
export PATH
alias vi=vim

4> 重新加载profile,使得设置立即生效 END

[root@localhost ~]# source /etc/profile

2. 设置vim高亮显示

[root@localhost etc]# pwd
/etc
[root@localhost etc]# vi vimrc
Error detected while processing /root/.vimrc:
line    1:
E117: Unknown function: pythogen#infect
E15: Invalid expression: pythogen#infect()
Press ENTER or type command to continue
[root@localhost etc]# source vimrc
-bash: vimrc: line 15: syntax error near unexpected token `"autocmd"'
-bash: vimrc: line 15: `if has("autocmd")'
[root@localhost etc]#

在vimrc文档结尾，把下面语句加进去。

set nocompatible
set number
filetype on 
set history=1000 
color eveing
syntax on 
set autoindent
set smartindent
set tabstop=4
set shiftwidth=4
set showmatch
set guioptions-=T
set vb t_vb=
set ruler
set nohls
set incsearch
if has("vms")
set nobackup
else
set backup
endif

完整的vimrc文件内容

[root@localhost ~]# cat /etc/vimrc
if v:lang =~ "utf8$" || v:lang =~ "UTF-8$"
   set fileencodings=ucs-bom,utf-8,latin1
endif

set nocompatible        " Use Vim defaults (much better!)
set bs=indent,eol,start         " allow backspacing over everything in insert mode
"set ai                 " always set autoindenting on
"set backup             " keep a backup file
set viminfo='20,\"50    " read/write a .viminfo file, don't store more
                        " than 50 lines of registers
set history=50          " keep 50 lines of command line history
set ruler               " show the cursor position all the time

" Only do this part when compiled with support for autocommands
if has("autocmd")
  augroup redhat
  autocmd!
  " In text files, always limit the width of text to 78 characters
  " autocmd BufRead *.txt set tw=78
  " When editing a file, always jump to the last cursor position
  autocmd BufReadPost *
  \ if line("'\"") > 0 && line ("'\"") <= line("$") |
  \   exe "normal! g'\"" |
  \ endif
  " don't write swapfile on most commonly used directories for NFS mounts or USB sticks
  autocmd BufNewFile,BufReadPre /media/*,/run/media/*,/mnt/* set directory=~/tmp,/var/tmp,/tmp
  " start with spec file template
  autocmd BufNewFile *.spec 0r /usr/share/vim/vimfiles/template.spec
  augroup END
endif

if has("cscope") && filereadable("/usr/bin/cscope")
   set csprg=/usr/bin/cscope
   set csto=0
   set cst
   set nocsverb
   " add any database in current directory
   if filereadable("cscope.out")
      cs add $PWD/cscope.out
   " else add database pointed to by environment
   elseif $CSCOPE_DB != ""
      cs add $CSCOPE_DB
   endif
   set csverb
endif

" Switch syntax highlighting on, when the terminal has colors
" Also switch on highlighting the last used search pattern.
if &t_Co > 2 || has("gui_running")
  syntax on
  set hlsearch
endif

filetype plugin on

if &term=="xterm"
     set t_Co=8
     set t_Sb=m
     set t_Sf=m
endif

" Don't wake up system with blinking cursor:
" http://www.linuxpowertop.org/known.php
let &guicursor = &guicursor . ",a:blinkon0"
     set nu!

     colorscheme desert
     syntax enable
     syntax on

"一键运行代码
map <F5> :call CompileRunGcc()<CR>
func! CompileRunGcc()
exec "w"
if &filetype == 'c'
exec "!g++ % -o %<"
exec "!time ./%<"
elseif &filetype == 'cpp'
exec "!g++ % -o %<"
exec "!time ./%<"
elseif &filetype == 'java'
exec "!javac %"
exec "!time java %<"
elseif &filetype == 'sh'
:!time bash %
elseif &filetype == 'python'
exec "!time python %"
elseif &filetype == 'html'
exec "!firefox % &"
elseif &filetype == 'go'
" exec "!go build %<"
exec "!time go run %"
elseif &filetype == 'mkd'
exec "!~/.vim/markdown.pl % > %.html &"
exec "!firefox %.html &"
endif
set nocompatible
set number
filetype on
set history=1000
color eveing
syntax on
set autoindent
set smartindent
set tabstop=4
set shiftwidth=4
set showmatch
set guioptions-=T
set vb t_vb=
set ruler
set nohls
set incsearch
if has("vms")
set nobackup
else
set backup
endif