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	<title>Nelson Crafting &#187; Ubuntu</title>
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	<description>Nelson&#039;s Archive of Life</description>
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		<title>ATI Mobility Radeon X2300与Ubuntu 9.04</title>
		<link>http://nelsonz.info/2009/06/01/ati-mobility-radeon-x2300%e4%b8%8eubuntu-904/</link>
		<comments>http://nelsonz.info/2009/06/01/ati-mobility-radeon-x2300%e4%b8%8eubuntu-904/#comments</comments>
		<pubDate>Sun, 31 May 2009 17:11:49 +0000</pubDate>
		<dc:creator>nelson</dc:creator>
				<category><![CDATA[IT]]></category>
		<category><![CDATA[Ubuntu]]></category>

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		<description><![CDATA[在以前的所有发行版中，Mobility Radeon X2300均需要安装受限驱动。但在9.04 Jaunty下却无法找到相应的受限驱动。按照一些方法强行安装fglrx后会在登录界面出现花屏，同时系统宕机，亦无法结束X Server。 经过测试，以下方法无效： 进入recovery模式，执行xfix自动修复显示问题；或， sudo dpkg-reconfigure –phigh xserver-xorg 由于安装的fglrx与硬件不兼容，卸载即可解决问题： 进入recovery模式，选择root模式，执行以下命令 sudo apt-get remove xorg-driver-fglrx<table class="wumii-related-items" cellspacing="0" cellpadding="2" border="0" width="100%" style="clear: both;">
    
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</table>]]></description>
			<content:encoded><![CDATA[<p>在以前的所有发行版中，Mobility Radeon X2300均需要安装受限驱动。但在9.04 Jaunty下却无法找到相应的受限驱动。按照一些方法强行安装fglrx后会在登录界面出现花屏，同时系统宕机，亦无法结束X Server。</p>
<p>经过测试，以下方法<strong><u>无效</u></strong>：</p>
<blockquote><p>进入recovery模式，执行xfix自动修复显示问题；或，      <br />sudo dpkg-reconfigure –phigh xserver-xorg</p>
</blockquote>
<p>由于安装的fglrx与硬件不兼容，卸载即可解决问题：</p>
<blockquote><p>进入recovery模式，选择root模式，执行以下命令     <br />sudo apt-get remove xorg-driver-fglrx</p>
</blockquote>
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			<wfw:commentRss>http://nelsonz.info/2009/06/01/ati-mobility-radeon-x2300%e4%b8%8eubuntu-904/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>Linux连接CUHK L2TP VPN的方法</title>
		<link>http://nelsonz.info/2009/02/27/linux%e8%bf%9e%e6%8e%a5cuhk-l2tp-vpn%e7%9a%84%e6%96%b9%e6%b3%95/</link>
		<comments>http://nelsonz.info/2009/02/27/linux%e8%bf%9e%e6%8e%a5cuhk-l2tp-vpn%e7%9a%84%e6%96%b9%e6%b3%95/#comments</comments>
		<pubDate>Thu, 26 Feb 2009 17:09:59 +0000</pubDate>
		<dc:creator>nelson</dc:creator>
				<category><![CDATA[IT]]></category>
		<category><![CDATA[Ubuntu]]></category>
		<category><![CDATA[VPN]]></category>

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		<description><![CDATA[几天前成功在Ubuntu 8.10 Intrepid Ibex下连接CUHK L2TP VPN。非常感谢Raptium同学，应该说是他先找出并解决了ITSC所提供方法的问题，我这里所做的基本就是整理工作。 本文以ITSC给出的方法为基础。之前的方法在ITSC关闭PPTP后失效。注意：此方法似乎仍然无法通过无线连接VPN（应该还是route的问题）。其他系统请参考ITSC的方法，并根据本文进行修改。 我使用了以下包（CD中不包含，请提前下载）： dhcp-client： - dhcpcd_3.2.3-1.1_i386.deb - pump_0.8.24-2.1_i386.deb - udhcpc_0.9.8cvs20050303-2.1_i386.deb ipsec-tools: ipsec-tools_0.7-2.1ubuntu1_i386.deb ppp: ppp_2.4.4rel-10ubuntu2_i386.deb racoon: racoon_0.7-2.1ubuntu1_i386.deb xl2tpd: xl2tpd_1.2.0+dfsg-1ubuntu1_i386.deb [Ubuntu 7.10、Debian 4.0等应该用l2tpd] 逐一安装好（racoon的configuration mode选direct）。 按照ITSC的说明编辑racoon.conf、psk.txt。提示：此处可能需要root权限，可使用gnome-sudo，也可使用sudo nano /etc/racoon/racoon.conf。 修改xl2tpd.conf时，请改为以下内容： [global] port = 1701 auth file = /etc/ppp/pap-secrets &#8230; <a href="http://nelsonz.info/2009/02/27/linux%e8%bf%9e%e6%8e%a5cuhk-l2tp-vpn%e7%9a%84%e6%96%b9%e6%b3%95/">Continue reading <span class="meta-nav">&#8594;</span></a><table class="wumii-related-items" cellspacing="0" cellpadding="3" border="0"  style="clear: both;">
    
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			<content:encoded><![CDATA[<p>几天前成功在Ubuntu 8.10 Intrepid Ibex下连接CUHK L2TP VPN。非常感谢<a href="http://www.raptium.com/" target="_blank">Raptium</a>同学，应该说是他先找出并解决了ITSC所提供方法的问题，我这里所做的基本就是整理工作。</p>
<p>本文以<a href="http://www.cuhk.edu.hk/itsc/network/vpn/linuxvpn.html" target="_blank">ITSC给出的方法</a>为基础。之前的方法在ITSC关闭PPTP后失效。注意：此方法似乎仍然无法通过无线连接VPN（应该还是route的问题）。其他系统请参考ITSC的方法，并根据本文进行修改。</p>
<p>我使用了以下包（CD中不包含，请提前下载）：</p>
<blockquote><p>dhcp-client：     <br />- dhcpcd_3.2.3-1.1_i386.deb      <br />- pump_0.8.24-2.1_i386.deb      <br />- udhcpc_0.9.8cvs20050303-2.1_i386.deb      <br />ipsec-tools: ipsec-tools_0.7-2.1ubuntu1_i386.deb      <br />ppp: ppp_2.4.4rel-10ubuntu2_i386.deb      <br />racoon: racoon_0.7-2.1ubuntu1_i386.deb      <br />xl2tpd: xl2tpd_1.2.0+dfsg-1ubuntu1_i386.deb [Ubuntu 7.10、Debian 4.0等应该用l2tpd]</p>
</blockquote>
<p><font color="#777777">逐一安装好（racoon的configuration mode选direct）。</font></p>
<p><font color="#777777">按照ITSC的说明编辑racoon.conf、psk.txt。提示：此处可能需要root权限，可使用gnome-sudo，也可使用sudo nano /etc/racoon/racoon.conf。</font></p>
<p><font color="#777777">修改xl2tpd.conf时，请改为以下内容：</font></p>
<blockquote><p>[global]     <br />port = 1701      <br />auth file = /etc/ppp/pap-secrets      <br />[lac connect]      <br />lns = vpn.cuhk.edu.hk      <br />; redial = yes      <br />; redial timeout = 15      <br />; max redials = 5      <br />; hidden bit = yes      <br />require pap = yes      <br /><strong>ppp debug = yes</strong>      <br /><strong>pppoptfile=/etc/ppp/options</strong></p>
</blockquote>
<p><font color="#777777">修正了两个地方：首先pppoptfile参数应当另起一行；另外应使用/etc/ppp/options而非/etc/ppp/options.xl2tpd。</font></p>
<p><font color="#777777">按照ITSC指示继续修改pap-secrets和options。</font></p>
<p><font color="#777777">ITSC的<a href="http://www.cuhk.edu.hk/itsc/network/vpn/linuxvpn/connect.sh" target="_blank">connect.sh</a>文件有问题，具体来说就是文件格式是Windows的，应转换成Unix格式的（Raptium同学的解释：应该移除所有^M）。Raptium给出的方法：首先用vim打开connect.sh，然后</font></p>
<blockquote><p>set ff=unix</p>
</blockquote>
<p><font color="#777777">不过也可以直接用我转换好的这个<a href="http://cid-161182cd3ca5b8dd.skydrive.live.com/self.aspx/Shared/connect.sh" target="_blank">connect.sh</a>。</font></p>
<p><font color="#777777">注意连接的时候需要有root权限。不妨sudo之。</font></p>
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			<wfw:commentRss>http://nelsonz.info/2009/02/27/linux%e8%bf%9e%e6%8e%a5cuhk-l2tp-vpn%e7%9a%84%e6%96%b9%e6%b3%95/feed/</wfw:commentRss>
		<slash:comments>5</slash:comments>
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		<title>Ubuntu 8.10使用nm-applet连接CUHK VPN</title>
		<link>http://nelsonz.info/2008/11/24/ubuntu-810%e4%bd%bf%e7%94%a8nm-applet%e8%bf%9e%e6%8e%a5cuhk-vpn/</link>
		<comments>http://nelsonz.info/2008/11/24/ubuntu-810%e4%bd%bf%e7%94%a8nm-applet%e8%bf%9e%e6%8e%a5cuhk-vpn/#comments</comments>
		<pubDate>Mon, 24 Nov 2008 10:03:09 +0000</pubDate>
		<dc:creator>nelson</dc:creator>
				<category><![CDATA[IT]]></category>
		<category><![CDATA[Ubuntu]]></category>
		<category><![CDATA[VPN]]></category>

		<guid isPermaLink="false">http://zhaonc.yo2.cn/articles/ubuntu-810%e4%bd%bf%e7%94%a8nm-applet%e8%bf%9e%e6%8e%a5cuhk-vpn.html</guid>
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			<content:encoded><![CDATA[<p>昨天装上了Ubuntu 8.10 (i386 DVD)。用NetworkManager+nm-applet图形界面连接中大VPN成功。以下为操作步骤。</p>
<p><strong>安装</strong></p>
<blockquote><p>默认已安装NetworkManager、nm-applet等组件。把DVD光碟作为软件源，用apt/synaptic安装pptp-linux、network-manager-pptp。</p></blockquote>
<p><strong>配置</strong></p>
<blockquote><p>打开network configuration（在nm-applet图标上点右键，编辑连接）。切换到VPN，添加。类型是Point-to-Point Tunneling Protocol。设置如下：<br />
* 非自动连接，非系统设置<br />
* 网关：vpn.cuhk.edu.hk<br />
* Username: s0xxxxxx<br />
* Password留空（此处好像是nm的bug。如果这里保存了密码，之后就会出现找不到secret机密的问题。<strike>不过我今天觉得通过修改/etc/dbus-1/system.d/NetworkManager.conf和/etc/dbus-1/system.d/nm-applet.conf 可以解决，尚未测试</strike>）<br />
* Advanced里面：选择PAP、MSCHAP、MSCHAPv2，不选Use Point-to-Point encryption (MPPE)、勾选其他的（包括Send PPP echo packets）<br />
* IPv4里面设置成自动(DHCP)<br />
用nm-applet连接。在弹出的要求密码窗口中输入密码即可连接。</p></blockquote>
<p>一些问题的解决：</p>
<p><strong>1. 如果nm-applet连接成功，但其他应用无法使用网络……</strong><br />
在终端中输入ip route。如果看到没有把dev ppp0加成default，就输入sudo ip route add default dev ppp0。</p>
<p><strong>2. 如果重新启动后nm-applet图标消失……</strong><br />
修改/etc/dbus-1/system.d/NetworkManager.conf 和 /etc/dbus-1/system.d/nm-applet.conf。除了secrets的以外所有deny都改为allow。<br />
重新启动 dbus：sudo /etc/init.d/dbus restart<br />
停止NetworkManager：sudo /etc/init.d/NetworkManager stop<br />
重建interfaces：sudo rm /etc/network/interfaces<br />
重新启动 NetworkManager：sudo /etc/init.d/NetworkManager start<br />
运行nm-applet。</p>
<p><strong>3. 如果直接显示连接失败……</strong><br />
多数是由于DNS的问题（尤其是无线和有线之间切换造成nm内部DNS处理混乱）。解决方法如下：<br />
sudo nano /etc/resolv.conf<br />
添加内容如下：</p>
<blockquote><p>nameserver 10.0.255.242<br />
nameserver 10.0.255.243<br />
search resnet.cuhk.edu.hk</p></blockquote>
<p>按Ctrl+O保存，Ctrl+X退出。</p>
<hr /><em>2008-11-24 18:00 Update：修改/etc/dbus-1/system.d/NetworkManager.conf和/etc/dbus-1/system.d/nm-applet.conf没有解决找不到机密的问题。</em></p>
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			<wfw:commentRss>http://nelsonz.info/2008/11/24/ubuntu-810%e4%bd%bf%e7%94%a8nm-applet%e8%bf%9e%e6%8e%a5cuhk-vpn/feed/</wfw:commentRss>
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		<title>Ubuntu 8.04修改主机名sudo命令无法执行的解决</title>
		<link>http://nelsonz.info/2008/06/30/ubuntu-804%e4%bf%ae%e6%94%b9%e4%b8%bb%e6%9c%ba%e5%90%8dsudo%e5%91%bd%e4%bb%a4%e6%97%a0%e6%b3%95%e6%89%a7%e8%a1%8c%e7%9a%84%e8%a7%a3%e5%86%b3/</link>
		<comments>http://nelsonz.info/2008/06/30/ubuntu-804%e4%bf%ae%e6%94%b9%e4%b8%bb%e6%9c%ba%e5%90%8dsudo%e5%91%bd%e4%bb%a4%e6%97%a0%e6%b3%95%e6%89%a7%e8%a1%8c%e7%9a%84%e8%a7%a3%e5%86%b3/#comments</comments>
		<pubDate>Mon, 30 Jun 2008 02:03:39 +0000</pubDate>
		<dc:creator>nelson</dc:creator>
				<category><![CDATA[IT]]></category>
		<category><![CDATA[Ubuntu]]></category>

		<guid isPermaLink="false">http://zhaonc.yo2.cn/articles/ubuntu-804%e4%bf%ae%e6%94%b9%e4%b8%bb%e6%9c%ba%e5%90%8dsudo%e5%91%bd%e4%bb%a4%e6%97%a0%e6%b3%95%e6%89%a7%e8%a1%8c%e7%9a%84%e8%a7%a3%e5%86%b3.html</guid>
		<description><![CDATA[Ubuntu 8.04 Hardy Heron在网络配置中修改主机名后，会出现如下症状（修改后重新登录）： 1. Terminal终端中使用sudo命令报错； 2. 在GUI中执行授权操作时，管理权限窗口无法显示。 经确认，通过修改/etc/hosts可以解决此问题。但在正常情况下需要root权限才能修改。因此需要登录到recovery修复模式中，使用root帐户修改/etc/hosts，即键入命令nano /etc/hosts。将其中的127.0.0.1 localhost改为：127.0.0.1 localhost [新的主机名]。例如主机名为MyComp，则应修改为 127.0.0.1 localhost MyComp 修改后按Ctrl+O保存，Ctrl+X退出，在终端中键入exit退出，重启即可。<table class="wumii-related-items" cellspacing="0" cellpadding="2" border="0" width="100%" style="clear: both;">
    
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			<content:encoded><![CDATA[<p>Ubuntu 8.04 Hardy Heron在网络配置中修改主机名后，会出现如下症状（修改后重新登录）：</p>
<blockquote><p><font>1. Terminal终端中使用sudo命令报错；</font></p>
<p><font>2. 在GUI中执行授权操作时，管理权限窗口无法显示。</font></p></blockquote>
<p>经确认，通过修改/etc/hosts可以解决此问题。但在正常情况下需要root权限才能修改。因此需要登录到recovery修复模式中，使用root帐户修改/etc/hosts，即键入命令nano /etc/hosts。将其中的127.0.0.1 localhost改为：<font>127.0.0.1 localhost [新的主机名]。例如主机名为MyComp，则应修改为</font></p>
<blockquote><p><font>127.0.0.1 localhost MyComp</font></p></blockquote>
<p>修改后按Ctrl+O保存，Ctrl+X退出，在终端中键入exit退出，重启即可。</p>
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