1.
File recoding recent activities: ~/.local/share/recently-used.xbel
直接删了就可以清除Dash Home里的最近记录
2.
设置图形界面的开机启动项： 在startup application里直接设置，或者想折腾的，写个 XXX.desktop保存到 ~/.config/autostart/ 这个目录下，具体格式差不多这样：
[Desktop Entry]
Type=Application
Exec=/home/alex/.keynav #执行的脚本位置
Hidden=false
NoDisplay=false
X-GNOME-Autostart-enabled=true
Name[en_US]=keynav
Name=keynav
Comment[en_US]=run keynav deamon
Comment=
3.
Ubuntu设置开机启动为文本界面：
/**
* All procedures I configured the computer to boot up in shell command
**/
/etc/default/grub
Comment the line GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash”, by adding # at the beginning, which will disable the Ubuntu purple screen.
Change GRUB_CMDLINE_LINUX=”" to GRUB_CMDLINE_LINUX=”text”, this makes Ubuntu boot directly into Text Mode.
Uncomment this line #GRUB_TERMINAL=console, by removing the # at the beginning, this makes Grub Menu into real black & white Text Mode (without background image)
sudo update-grub
原文：http://www.cnblogs.com/alex-wood/p/4022008.html