The problem:
After I installed Gentoo, I found that tab completion with sudo doesn't work. i.e., type:
$sudo emer[tab]
doesn't shows or completes with the word "emerge". Without sudo, the tab completion works.
Solution:
install bash-completion package, and
$eselect bashcomp base gentoo ssh
When I use vesafb and set vga=xxx as kernel option to change the resolution, the screen goes blank at boot time. I know the system is still booting, nothing is wrong except the screen.
I finally found the solution. I appears the framebuffer module is not loaded with the kernel.
The walkthough is to edit /etc/modules.autoload.d/kernel-2.6 (in Gentoo, other distros may have different path) to add these two lines:
fbcon
vesafb
升级x11-misc/shared-mime-info-0.40后打不开pdf、zip等文件，所有格式均识别为mime/plain-text。
解决办法为：
$ update-mime-database ~/.local/share/mime/
# update-mime-database /usr/local/share/mime/
Introducion
You know the menu that's shown if you start the kde-menu, gnome-menu, xfce-menu or something else. There's no real name for this kind of menu (it's also often called "root-menu"), but the menu is saved in a Freedesktop-Standard.
Where are the files saved?
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