在任务栏显示网速

sudo add-apt-repository ppa:nilarimogard/webupd8sudo apt-get updatesudo apt-get install indicator-netspeed

shell 快捷键：

<Ctrl-e>:jump to end

<Ctrl-a>:jump to start

<Ctrl-k>:delete from cursor pos to the end　(<Ctrl-w>)

<Ctrl-u>:delete from start to the curpos

<Ctrl-h>:equals key delete

<Ctrl-l>:clear the screen

shell中输入dash:

进入后可输入应用程序名启动应用程序