详细安装步骤在github上有，https://github.com/Valloric/YouCompleteMe，我这里是自己总结的简化版安装步骤。

步骤1.安装Vundle

首先，clone到本地

• git clone https://github.com/VundleVim/Vundle.vim.git ~/.vim/bundle/Vundle.vim
• 把以下内容复制到.vimrc:

•   set nocompatible              " be iMproved, requiredfiletype off                  " required" set the runtime path to include Vundle and initializeset rtp+=~/.vim/bundle/Vundle.vimcall vundle#begin()" alternatively, pass a path where Vundle should install plugins"call vundle#begin('~/some/path/here')" let Vundle manage Vundle, requiredPlugin 'VundleVim/Vundle.vim'" The following are examples of different formats supported." Keep Plugin commands between vundle#begin/end." plugin on GitHub repoPlugin 'tpope/vim-fugitive'" plugin from http://vim-scripts.org/vim/scripts.html" Plugin 'L9'" Git plugin not hosted on GitHubPlugin 'git://git.wincent.com/command-t.git'" git repos on your local machine (i.e. when working on your own plugin)"Plugin 'file:///home/gmarik/path/to/plugin'" The sparkup vim script is in a subdirectory of this repo called vim." Pass the path to set the runtimepath properly.Plugin 'rstacruz/sparkup', {'rtp': 'vim/'}" Install L9 and avoid a Naming conflict if you've already installed a" different version somewhere else." Plugin 'ascenator/L9', {'name': 'newL9'}" All of your Plugins must be added before the following linecall vundle#end()            " requiredfiletype plugin indent on    " required" To ignore plugin indent changes, instead use:"filetype plugin on"
    " Brief help" :PluginList       - lists configured plugins" :PluginInstall    - installs plugins; append `!` to update or just :PluginUpdate" :PluginSearch foo - searches for foo; append `!` to refresh local cache" :PluginClean      - confirms removal of unused plugins; append `!` to auto-approve removal"
    " see :h vundle for more details or wiki for FAQ" Put your non-Plugin stuff after this line

• Install Plugins: 打开vim执行:PluginInstall 或者直接输入命令sudo vim +PluginInstall +qall

步骤2.安装工具和cmake

• sudo apt-get install build-essential cmake

步骤3.安装python-dev,python3-dev

• sudo apt-get install python-dev python3-dev

步骤4.安装clang

• sudo apt-get install clang

步骤5.编译

• cd ~/.vim/bundle/YouCompleteMe
• ./install.py --clang-completer
• 如果编译出错执行：git submodule update --init --recursive

步骤6.复制以下内容到.vimrc中

  "----------------------------""------ YouCompleteMe -------""----------------------------"let g:ycm_global_ycm_extra_conf = '~/.vim/bundle/YouCompleteMe/cpp/ycm/.ycm_extra_conf.py'" YouCompleteMeset runtimepath+=~/.vim/bundle/YouCompleteMelet g:ycm_collect_identifiers_from_tags_files = 1           " 开启 YCM 基于标签引擎let g:ycm_collect_identifiers_from_comments_and_strings = 1 " 注释与字符串中的内容也用于补全let g:syntastic_ignore_files=[".*\.py$"]let g:ycm_seed_identifiers_with_syntax = 1                  " 语法关键字补全let g:ycm_complete_in_comments = 1let g:ycm_confirm_extra_conf = 0let g:ycm_key_list_select_completion = ['<c-n>', '<Down>']  " 映射按键, 没有这个会拦截掉tab, 导致其他插件的tab不能用.let g:ycm_key_list_previous_completion = ['<c-p>', '<Up>']let g:ycm_complete_in_comments = 1                          " 在注释输入中也能补全let g:ycm_complete_in_strings = 1                           " 在字符串输入中也能补全let g:ycm_collect_identifiers_from_comments_and_strings = 1 " 注释和字符串中的文字也会被收入补全let g:ycm_global_ycm_extra_conf='~/.vim/bundle/YouCompleteMe/third_party/ycmd/cpp/ycm/.ycm_extra_conf.py'let g:ycm_show_diagnostics_ui = 0                           " 禁用语法检查inoremap <expr> <CR> pumvisible() ? "\<C-y>" : "\<CR>" |            " 回车即选中当前项nnoremap <c-j> :YcmCompleter GoToDefinitionElseDeclaration<CR>|     " 跳转到定义处"let g:ycm_min_num_of_chars_for_completion=2                 " 从第2个键入字符就开始罗列匹配项

步骤7.出现的错误

我安装完以后，出现了以下错误：

YouCompleteMe unavailable: requires Vim compiled with Python (2.6+ or 3.3+)

解决办法：编译安装vim8.0,添加python支持

网址:在deepin上安装YouCompleteMe