＋ｘ和＋７７７

chmod +x　　　　 改变文件为可执行状态

chmod 777 　　　所有人可读可写

内核降级(内核尽量别动

https://blog.51cto.com/u_13045706/3833242

或http://note.youdao.com/s/P0VQg4ti

自启动

https://roboppn.top/docs/Ubuntu/Ubuntu%E8%87%AA%E5%90%AF%E5%8A%A8%E7%A8%8B%E5%BA%8F

[

](https://blog.csdn.net/seniorc/article/details/112770389)grub

./bashrc wenjianzhong 117 line “fi” error

cd /etc/skel       //