Ubuntu 14.04中把Gnome 3.10升级到Gnome 3.12的方法
<p style='margin: 0px; padding: 5px 0px; outline: none; font-size: 14px; line-height: 30px; font-family: tahoma, arial, "Microsoft YaHei";'>如果你最近安装或是更新到Ubuntu Gnome 14.04 LTS，你将能享受到一个稳定和可靠的Gnome shell体验。但Ubuntu 14.04中使用的是Gnome 3.10而并非最新的Gnome 3.12，那该如何升级到Gnome 3.12呢？</p>
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<strong>升级前需要先了解为什么默认的是Gnome 3.10</strong></p>
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Gnome 3.12于3月下旬发布，虽然早于Ubuntu 14.04发布却并未集成在Ubuntu Gnome 14.04中。这是因为Gnome 3.12的开发周期使得其没有足够的时间进行审查和测试来支持LTS版本，默认的Gnome 3.10则能保证其稳定性。这就是不推荐升级至Gnome 3.12的原因。</p>
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如果你已明了会遇到的风险还想升级至Gnome 3.12，你可以参看下面的方法。</p>
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<strong>在升级之前请确保使用的是Ubuntu 14.04，同时安装了Gnome 3.10。</strong>如果你使用的是Unity等非Gnome桌面环境，还需要先安装Gnome 3.10。</p>
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apt:gnome-shell(点击安装)</p>
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然后确保系统已经更新，</p>
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<span><u>复制代码</u></span>
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代码如下:</p>
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sudo apt-get update && sudo apt-get dist-upgrade</div>
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如果有更新须先安装更新，完成更新后添加升级PPA，</p>
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<span><u>复制代码</u></span>
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代码如下:</p>
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sudo add-apt-repository ppa:gnome3-team/gnome3-staging<br>
sudo apt-get update && sudo apt-get dist-upgrade</div>
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等待系统升级至Gnome 3.12，如果你想体验其更多特性还需要安装地图等新应用，</p>
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代码如下:</p>
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sudo apt-get install epiphany-browser gnome-maps polari -y</div>
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安装完成后重启，在登录界面记得选择Gnome会话。</p>
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<font color="#428bca"><span><img style="max-width:100%!important;height:auto!important;"title="Ubuntu 14.04中把Gnome 3.10升级到Gnome 3.12的方法" alt="Ubuntu 14.04中把Gnome 3.10升级到Gnome 3.12的方法" src="https://zhuji.jb51.net/uploads/img/202305/cdc4d7a271053ebc951d473ba22c6a53.jpg"></span></font></p>
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如果你想退回到Gnome 3.10，你可以通过下面的命令清除之前添加的升级PPA。</p>
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<span><u>复制代码</u></span>
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代码如下:</p>
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sudo apt-get install ppa-purge<br>
sudo ppa-purge ppa:gnome3-team/gnome3-staging</div>
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