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$ git clone https://github.com/universal-ctags/ctags.git
    $ cd ctags
    $ ./autogen.sh
    $ ./configure  # use --prefix=/where/you/want to override installation directory, defaults to /usr/local
    $ make
    $ make install # may require extra privileges depending on where to install

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curl -fLo ~/.vim/autoload/plug.vim --create-dirs \
  https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim

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call plug#begin('~/.vim/plugged')
" 在这里添加您的插件配置
call plug#end()

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call plug#begin('~/.vim/plugged')
Plug 'itchyny/lightline.vim'
Plug 'neoclide/coc.nvim', {'branch': 'release'}
call plug#end()

$ vim        #打开vim
:PlugStatus  #查看插件状态
:PlugInstall #安装之前在配置文件中声明的插件

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https://github.com/mileszs/ack.vim

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?    a quick summary of these keys, repeat to close
o    to open (same as Enter)
O    to open and close the quickfix window
go   to preview file, open but maintain focus on ack.vim results
t    to open in new tab
T    to open in new tab without moving to it
h    to open in horizontal split
H    to open in horizontal split, keeping focus on the results
v    to open in vertical split
gv   to open in vertical split, keeping focus on the results
q    to close the quickfix window

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Plug 'jlanzarotta/bufexplorer' 
" 安装bufexplorer插件

""""""""""""""""""""""""""""""
" BufExplorer          
""""""""""""""""""""""""""""""
let g:bufExplorerDefaultHelp=0       " Do not show default help.                                                                                                                                                                                  
let g:bufExplorerShowRelativePath=1  " Show relative paths.
let g:bufExplorerSortBy='mru'        " Sort by most recently used.
let g:bufExplorerSplitRight=1        " Split left.
let g:bufExplorerSplitVertical=1     " Split vertically.
let g:bufExplorerSplitVertSize = 30  " Split width
let g:bufExplorerUseCurrentWindow=1  " Open in new window.
let g:bufExplorerDisableDefaultKeyMapping =0 " Do not disable default key mappings.
nnoremap <silent> <F4> :BufExplorer<CR>

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Plug 'ctrlpvim/ctrlp.vim'

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sudo yum install cscope

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set cscopequickfix=s-,c-,d-,i-,t-,e-
set csprg=cscope
set csto=0
set cst
set nocsverb
if filereadable("/usr/bin/cscope")
    set csprg=/usr/bin/cscope
endif

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cscope -Rbq