ubuntu 12.04 google(Ubuntu安装chrome)
大家好，今天小编来为大家解答ubuntu 12.04 google这个问题，Ubuntu安装chrome很多人还不知道，现在让我们一起来看看吧！
Ubuntu 12.04安装Gnome Shell扩展的方法
在Ubuntu 12.04中安装Gnome Shell扩展，有助于增强系统的个性化和功能性。下面将介绍几种常见的Gnome Shell扩展及其安装方法。
1. AlternateTab：使用此扩展，您在切换应用时，只需按下Alt+Tab键即可预览窗口内容，无需查看图标。
2. Applications Menu：这款扩展模仿了Gnome 2.x时代的应用程序菜单样式，让您在启动器中找到应用更加便捷。
3. Brightness Control：如果您使用的是笔记本电脑，这款扩展特别适合您。它允许您轻松调整屏幕亮度，适应不同环境。
4. Places Status Indicator：安装此扩展后，您可以访问文件目录菜单，提高文件管理效率。
5. System Monitor：此扩展能实时监控您的电脑状态，包括CPU、内存、硬盘和网络流量等关键指标。
6. User Themes：强烈推荐安装该扩展。在更改系统主题时，您需要此扩展的支持。
ubuntu12.04怎么改变更新源
1、首先备份 Ubuntu12.04源列表
sudo cp/etc/apt/sources.list/etc/apt/sources.list.backup（备份下当前的源列表）
2、修改更新源
sudo gedit/etc/apt/sources.list（打开 Ubuntu 12.04源列表文件）
3、把里面的列表替换成下面的列表
163源
deb precise main restricted
deb-src precise main restricted
deb precise-updates main restricted
deb-src precise-updates main restricted
deb precise universe
deb-src precise universe
deb precise-updates universe
deb-src precise-updates universe
deb precise multiverse
deb-src precise multiverse
deb precise-updates multiverse
deb-src precise-updates multiverse
deb precise-backports main restricted universe multiverse
deb-src precise-backports main restricted universe multiverse
deb precise-security main restricted
deb-src precise-security main restricted
deb precise-security universe
deb-src precise-security universe
deb precise-security multiverse
deb-src precise-security multiverse
deb precise main
deb-src precise main
sohu源
deb precise main restricted
deb-src precise main restricted
deb precise-updates main restricted
deb-src precise-updates main restricted
deb precise universe
deb-src precise universe
deb precise-updates universe
deb-src precise-updates universe
deb precise multiverse
deb-src precise multiverse
deb precise-updates multiverse
deb-src precise-updates multiverse
deb precise-backports main restricted universe multiverse
deb-src precise-backports main restricted universe multiverse
deb precise-security main restricted
deb-src precise-security main restricted
deb precise-security universe
deb-src precise-security universe
deb precise-security multiverse
deb-src precise-security multiverse
deb precise main
deb-src precise main
ubuntu.cn99.com源（推荐）:
deb precise main restricted universe multiverse
deb precise-updates main restricted universe multiverse
deb precise-security main restricted universe multiverse
deb precise-backports main restricted universe multiverse
deb precise main restricted universe multiverse
教育网源
如果你是在校大学生，可以使用校园网/教育网，就是用教育网的资源吧，尤其是支持 ipv6的，那更新速度就按兆算了。
#电子科技大学
deb precise main restricted universe multiverse
deb precise-backports main restricted universe multiverse
deb precise-proposed main restricted universe multiverse
deb precise-security main restricted universe multiverse
deb precise-updates main restricted universe multiverse
deb-src precise main restricted universe multiverse
deb-src precise-backports main restricted universe multiverse
deb-src precise-proposed main restricted universe multiverse
deb-src precise-security main restricted universe multiverse
deb-src precise-updates main restricted universe multiverse
#中国科技大学
deb precise main restricted universe multiverse
deb precise-backports restricted universe multiverse
deb precise-proposed main restricted universe multiverse
deb precise-security main restricted universe multiverse
deb precise-updates main restricted universe multiverse
deb-src precise main restricted universe multiverse
deb-src precise-backports main restricted universe multiverse
deb-src precise-proposed main restricted universe multiverse
deb-src precise-security main restricted universe multiverse
deb-src precise-updates main restricted universe multiverse
#北京理工大学
deb precise main multiverse restricted universe
deb precise-backports main multiverse restricted universe
deb precise-proposed main multiverse restricted universe
deb precise-security main multiverse restricted universe
deb precise-updates main multiverse restricted universe
deb-src precise main multiverse restricted universe
deb-src precise-backports main multiverse restricted universe
deb-src precise-proposed main multiverse restricted universe
deb-src precise-security main multiverse restricted universe
deb-src precise-updates main multiverse restricted universe
Ubuntu 14.04双显卡设备出现未知显示器解决方法
原文点这里
安装完Ubuntu 14.04之后，本人迅速调会了Ubuntu 12.04的使用习惯，包括在启动器中显示工作区等。装完系统后，本人发现鼠标一闪一闪时有时无，而且经常会往右边屏幕上跑。设置完工作区后本人还发现了一个更严重的问题，点击工作区时出现了一个非常不科学的情况，我的屏幕居然有大片内容没有显示出来，并且屏幕的实际分辨率居然高达2390像素。
于是打开系统设置->显示设置，本人发现了多出来了一个“未知显示器”（Unknown Display），这一屏显示在正确的屏幕右边，大小设置是1024×768，正好与启动器中显示的多余部分相同。
Google了一下之后本人找到了一个标题为《Non-existent display detected in both intel driver and nvidia driver(Optimus Laptop)》的Bug，已经被Ubuntu官方确认。官方对这个错误的解释是双显卡驱动的情况下（比如本人的笔记本是就是集显和N卡热切换）Ubuntu会同时读出两个显示器，显示的效果即为一个内置显示器和一个未知显示器。Bug确认之后修复就很简单了，对于双显卡的电脑只需要安装Bumblebee之后重启就可以解决问题了：
sudo apt-get install bumblebee-nvidia
当然一个非常快捷简单的方法就是利用Unity提供的设置功能关闭这个多出来的“未知显示器”了。访问系统设置->显示，在屏幕选择框里点击未知显示器，将下方新出现的“未知显示器”文字右侧的开启按钮调整为关闭，点击应用即完成设置了。
当然双显卡电脑的话肯定会安装Bumblebee，安装之后“未知显示器”就会自动消失。相信Ubuntu会尽快修复这个Bug。
