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linux.html
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<!doctype html>
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linux - Kid's blog
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<div class="article">
<a class="clearlink" href="14696960194399.html">
<h1>shadowsocks-libev安装</h1>
<div class="a-content">
<div class="a-content-text">
<h2 id="toc_0"><a href="http://www.vultr.com/?ref=6938970-3B">vultr</a></h2>
<p>在此之前你必须拥有一台国外的vps，在我比较了很多服务商（digitalocean，Linode等）之后，从性价比角度我选择了<a href="http://www.vultr.com/?ref=6938970-3B">vultr</a> 这家，你可以选择用信用卡方式注册或用PayPal，信用卡注册至少要10美元充值激活，PayPal需要5美元充值激活。Linode每月至少10美元太贵了，digitalocean的机器已经不如当年。vultr这家不错，我不是托，我确实测试过。而且有大量的优惠码。注册成功后就申请一台每月5美元的linux的vps吧，系统debian或CentOS都可以。基于此你必须要懂linux基础，负责会一头雾水，另外这东西没人会用windows去做。</p>
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<div class="more-left left">
<a href="14696960194399.html">Read more</a>
<span class="date">2016/7/6</span>
<span>posted in </span>
<span class="posted-in"><a href='shadowsocks.html'>shadowsocks</a></span>
<span class="posted-in"><a href='linux.html'>linux</a></span>
<span class="posted-in"><a href='technology.html'>技术</a></span>
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</div><!-- article -->
<div class="article">
<a class="clearlink" href="14694259379580.html">
<h1>linux账号与用户组相关文件详解</h1>
<div class="a-content">
<div class="a-content-text">
<ul>
<li>
<a href="#toc_0">相关文件</a>
</li>
<li>
<a href="#toc_1">/etc/passwd字段详解</a>
</li>
<li>
<a href="#toc_2">/etc/shadow （mac无此文件）文件字段详解</a>
</li>
<li>
<a href="#toc_3">/etc/group 文件字段详解</a>
</li>
<li>
<a href="#toc_4">/etc/gshadow （mac无此文件） 文件字段详解</a>
</li>
</ul>
<p><strong>很多程序的运行都与权限有关，而权限与UID和GID有关，理解下面的这些文件对于账号的管理是必须的</strong></p>
<h2 id="toc_0">相关文件</h2>
<pre><code>1. /etc/passwd 此文件包含了该系统下的所有账号信息
2. /etc/group 此文件包含了该系统的所有组名
3. /etc/shadow 此文件包含了该系统所有账号的密码
4. /etc/gshadow 涉及到用户组管理员的功能，很少用到
</code></pre>
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<a href="14694259379580.html">Read more</a>
<span class="date">2014/8/25</span>
<span>posted in </span>
<span class="posted-in"><a href='%E7%AC%AC14%E7%AB%A0Linux%E8%B4%A6%E5%8F%B7%E7%AE%A1%E7%90%86%E4%B8%8EACL%E6%9D%83%E9%99%90%E8%AE%BE%E7%BD%AE.html'>第14章Linux账号管理与ACL权限设置</a></span>
<span class="posted-in"><a href='technology.html'>技术</a></span>
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<div class="article">
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<h1>用户身份切换（su与sudo）</h1>
<div class="a-content">
<div class="a-content-text">
<ul>
<li>
<a href="#toc_0">su命令</a>
</li>
<li>
<a href="#toc_1">sudo命令</a>
<ul>
<li>
<a href="#toc_2">给用户组设置sudo</a>
</li>
</ul>
</li>
</ul>
<h2 id="toc_0">su命令</h2>
<p><code>su</code> 单纯的使用su命令，读取的变量设置方式为non-login shell的方式，这种方式下很多原本的变量不会被改变。如PATH USER 等。</p>
<p><code>su -</code> 在大多数情况下应用此命令来切换成root，这种方式将用login-shell 的方式。退出root时用<code>exit</code> .</p>
<p><code>su - -c "more /etc/shadow"</code> 当想要用root权限执行完一条命令后立马切回到当前用户时使用此命令，-c 后面直接接命令。</p>
<p><code>su -l 用户名</code> 或<code>su - 用户名</code> 使用此命令可随意切换成其他账号，前提是必须用于这些账号的密码，切换后的账号完全拥有该账号的各种环境变量。</p>
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</a>
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<a href="14696853158049.html">Read more</a>
<span class="date">2014/7/28</span>
<span>posted in </span>
<span class="posted-in"><a href='%E7%AC%AC14%E7%AB%A0Linux%E8%B4%A6%E5%8F%B7%E7%AE%A1%E7%90%86%E4%B8%8EACL%E6%9D%83%E9%99%90%E8%AE%BE%E7%BD%AE.html'>第14章Linux账号管理与ACL权限设置</a></span>
<span class="posted-in"><a href='technology.html'>技术</a></span>
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<a href="14696960194399.html">shadowsocks-libev安装</a>
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<a href="14694259379580.html">linux账号与用户组相关文件详解</a>
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<a href="14696853158049.html">用户身份切换（su与sudo）</a>
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