1.xclip （粘贴工具）
sudo apt-get install xclip
2.htop (进程管理)
sudo apt-get install htop
3.tree (树形目录)
sudo apt-get install tree
4.便签
sudo apt-get install indicator-stickynotes
sudo apt-get install xclip
sudo apt-get install htop
sudo apt-get install tree
sudo apt-get install indicator-stickynotes
![sudo apt-get update 出错 Updating from such a repository can‘t be done securely, and is therefore[图]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)