Pengurusan Kumpulan Linux Setiap pengguna mesti tergolong dalam kumpulan dan tidak boleh bebas daripada luar kumpulan

<code class="hljs markdown vditor-linenumber" style="max-height:1000px">chown 命令用途更改与文件关联的所有者或组。
<span class="hljs-bullet"> -<span> chown 用户名 文件名
<span class="hljs-section"> -R 递归目录下的子文件及目录
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chgrp 变更文件或目录的所属群组
<span class="hljs-bullet"> -<span> chgrp 组名 文件名
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<code style="max-height:1000px" class="hljs markdown vditor-linenumber">usermod -g 组名 用户名
<span class="hljs-section">usermod -d 目录名 用户名 # 用于改变用户登录的初始目录
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cat /etc/group | grep manager # 只过滤manager的组
<span class="hljs-code">-i：忽略大小写进行匹配。
-v：反向查找，只打印不匹配的行。
-n：显示匹配行的行号。
-r：递归查找子目录中的文件。
-l：只打印匹配的文件名。
-c：只打印匹配的行数。
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<code style="max-height:1000px" class="hljs pgsql vditor-linenumber">[<span class="hljs-keyword">admin<span>@centos7 ~]$ ll
总用量 <span class="hljs-number">8<span>
drwxrwxr-x. <span class="hljs-number">2<span> <span class="hljs-keyword">admin<span> <span class="hljs-keyword">admin<span> <span class="hljs-number">6<span> <span class="hljs-number">4<span>月 <span class="hljs-number">5<span> <span class="hljs-number">10<span>:<span class="hljs-number">36<span> Downloads
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r(<span class="hljs-number">4<span>)<span class="hljs-comment">--- >read<span>
 - 可读取文件内容，可查看目录内容
w(<span class="hljs-number">2<span>)<span class="hljs-comment">--- >write<span>
 - 可写，包含创建、删除及重命名目录
x(<span class="hljs-number">1<span>)<span class="hljs-comment">--- >execute<span>
 - 可执行文件，可进入目录
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chmod <span class="hljs-number">777<span># 修改为可读可写可执行，<span class="hljs-keyword">User<span> <span class="hljs-keyword">Group<span> Other
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<code style="max-height:1000px" class="hljs perl vditor-linenumber"><span class="hljs-number">1<span>)<span class="hljs-keyword">chmod<span> u=rwx,g=rx,o=<span class="hljs-keyword">x<span> 文件名/目录名
<span class="hljs-keyword">chmod<span> <span class="hljs-number">761<span> 文件名/目录名
<span class="hljs-number">2<span>)<span class="hljs-keyword">chmod<span> o+w 文件名/目录名<span class="hljs-comment"># 给other其他用户赋w权限<span>
<span class="hljs-number">3<span>)<span class="hljs-keyword">chmod<span> a-<span class="hljs-keyword">x<span> 文件名/目录名<span class="hljs-comment"># 给all全部用户的x权限去掉<span>
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