1.复制/etc/skel目录为/home/tuser1,要求/home/tuser1及其内部文件的属组和其他用户均没有任何访问权限；
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<ol class="linenums"><li class="L0"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> cp </span><span class="pun">-</span><span class="pln">r </span><span class="pun">/</span><span class="pln">etc</span><span class="pun">/</span><span class="pln">skel</span><span class="pun">/</span><span class="pln"> </span><span class="pun">/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">tuser1</span></code></li><li class="L1"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> ls </span><span class="pun">-</span><span class="pln">ld </span><span class="pun">/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">tuser1</span></code></li><li class="L2"><code class="language-sh"><span class="pln">drwxr</span><span class="pun">-</span><span class="pln">xr</span><span class="pun">-</span><span class="pln">x</span><span class="pun">.</span><span class="pln"> </span><span class="lit">2</span><span class="pln"> root root </span><span class="lit">72</span><span class="pln"> </span><span class="lit">11</span><span class="pun">月</span><span class="pln"> </span><span class="lit">27</span><span class="pln"> </span><span class="lit">11</span><span class="pun">:</span><span class="lit">30</span><span class="pln"> </span><span class="pun">/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">tuser1</span></code></li><li class="L3"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> chmod </span><span class="pun">-</span><span class="pln">R go</span><span class="pun">=</span><span class="pln"> </span><span class="pun">/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">tuser1</span></code></li><li class="L4"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> ls </span><span class="pun">-</span><span class="pln">ld </span><span class="pun">/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">tuser1</span></code></li><li class="L5"><code class="language-sh"><span class="pln">drwx</span><span class="pun">------.</span><span class="pln"> </span><span class="lit">2</span><span class="pln"> root root </span><span class="lit">72</span><span class="pln"> </span><span class="lit">11</span><span class="pun">月</span><span class="pln"> </span><span class="lit">27</span><span class="pln"> </span><span class="lit">11</span><span class="pun">:</span><span class="lit">30</span><span class="pln"> </span><span class="pun">/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">tuser1</span></code></li></ol> |
2.编辑/etc/group文件，添加组hadoop；
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<ol class="linenums"><li class="L0"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> tail </span><span class="pun">-</span><span class="lit">1</span><span class="pln"> </span><span class="pun">/</span><span class="pln">etc</span><span class="pun">/</span><span class="pln">group</span></code></li><li class="L1"><code class="language-sh"><span class="pln">hadoop</span><span class="pun">:</span><span class="pln">x</span><span class="pun">:</span><span class="lit">1009</span><span class="pun">:</span></code></li></ol> |
3.手动编辑/etc/passwd文件新增一行，添加用户hadoop,其基本组ID为hadoop组的id号，其家目录为/home/hadoop；
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<ol class="linenums"><li class="L0"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> id hadoop</span></code></li><li class="L1"><code class="language-sh"><span class="pln">id</span><span class="pun">:</span><span class="pln"> hadoop</span><span class="pun">:</span><span class="pln"> no such user</span></code></li><li class="L2"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> vim </span><span class="pun">/</span><span class="pln">etc</span><span class="pun">/</span><span class="pln">passwd</span></code></li><li class="L3"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> tail </span><span class="pun">-</span><span class="lit">1</span><span class="pln"> </span><span class="pun">/</span><span class="pln">etc</span><span class="pun">/</span><span class="pln">passwd</span></code></li><li class="L4"><code class="language-sh"><span class="pln">hadoop</span><span class="pun">:</span><span class="pln">x</span><span class="pun">:</span><span class="lit">1009</span><span class="pun">:</span><span class="lit">1009</span><span class="pun">::/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">hadoop</span><span class="pun">:/</span><span class="pln">sbin</span><span class="pun">/</span><span class="pln">nologin</span></code></li><li class="L5"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> id hadoop</span></code></li><li class="L6"><code class="language-sh"><span class="pln">uid</span><span class="pun">=</span><span class="lit">1009</span><span class="pun">(</span><span class="pln">hadoop</span><span class="pun">)</span><span class="pln"> gid</span><span class="pun">=</span><span class="lit">1009</span><span class="pun">(</span><span class="pln">hadoop</span><span class="pun">)</span><span class="pln"> </span><span class="pun">组=</span><span class="lit">1009</span><span class="pun">(</span><span class="pln">hadoop</span><span class="pun">)</span></code></li></ol> |
4.复制/etc/skel目录为/home/hadoop,要求修改hadoop目录的属组和其他用户没任何访问权限；
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<ol class="linenums"><li class="L0"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> install </span><span class="pun">-</span><span class="pln">d </span><span class="pun">/</span><span class="pln">etc</span><span class="pun">/</span><span class="pln">skel</span><span class="pun">/</span><span class="pln"> </span><span class="pun">/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">hadoop</span></code></li><li class="L1"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> ls </span><span class="pun">-</span><span class="pln">ld </span><span class="pun">/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">hadoop</span></code></li><li class="L2"><code class="language-sh"><span class="pln">drwxr</span><span class="pun">-</span><span class="pln">xr</span><span class="pun">-</span><span class="pln">x</span><span class="pun">.</span><span class="pln"> </span><span class="lit">2</span><span class="pln"> root root </span><span class="lit">6</span><span class="pln"> </span><span class="lit">11</span><span class="pun">月</span><span class="pln"> </span><span class="lit">27</span><span class="pln"> </span><span class="lit">11</span><span class="pun">:</span><span class="lit">54</span><span class="pln"> </span><span class="pun">/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">hadoop</span></code></li><li class="L3"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> chmod go</span><span class="pun">=</span><span class="pln"> </span><span class="pun">/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">hadoop</span></code></li><li class="L4"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> ls </span><span class="pun">-</span><span class="pln">ld </span><span class="pun">/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">hadoop</span></code></li><li class="L5"><code class="language-sh"><span class="pln">drwx</span><span class="pun">------.</span><span class="pln"> </span><span class="lit">2</span><span class="pln"> root root </span><span class="lit">6</span><span class="pln"> </span><span class="lit">11</span><span class="pun">月</span><span class="pln"> </span><span class="lit">27</span><span class="pln"> </span><span class="lit">11</span><span class="pun">:</span><span class="lit">54</span><span class="pln"> </span><span class="pun">/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">hadoop</span></code></li></ol> |
5.修改/home/hadoop目录及其内部所有文件的属主为hadoop,属组为hadoop；
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<ol class="linenums"><li class="L0"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> ls </span><span class="pun">-</span><span class="pln">ld </span><span class="pun">/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">hadoop</span><span class="pun">/</span></code></li><li class="L1"><code class="language-sh"><span class="pln">drwx</span><span class="pun">------.</span><span class="pln"> </span><span class="lit">2</span><span class="pln"> root root </span><span class="lit">6</span><span class="pln"> </span><span class="lit">11</span><span class="pun">月</span><span class="pln"> </span><span class="lit">27</span><span class="pln"> </span><span class="lit">11</span><span class="pun">:</span><span class="lit">54</span><span class="pln"> </span><span class="pun">/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">hadoop</span><span class="pun">/</span></code></li><li class="L2"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> chown </span><span class="pun">-</span><span class="pln">R hadoop</span><span class="pun">.</span><span class="pln">hadoop </span><span class="pun">/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">hadoop</span><span class="pun">/</span></code></li><li class="L3"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> ls </span><span class="pun">-</span><span class="pln">ld </span><span class="pun">/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">hadoop</span><span class="pun">/</span></code></li><li class="L4"><code class="language-sh"><span class="pln">drwx</span><span class="pun">------.</span><span class="pln"> </span><span class="lit">2</span><span class="pln"> hadoop hadoop </span><span class="lit">6</span><span class="pln"> </span><span class="lit">11</span><span class="pun">月</span><span class="pln"> </span><span class="lit">27</span><span class="pln"> </span><span class="lit">11</span><span class="pun">:</span><span class="lit">54</span><span class="pln"> </span><span class="pun">/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">hadoop</span><span class="pun">/</span></code></li></ol> |
6.显示/porc/meminfo文件中以大写或小写S开头的行；两种方式；
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<ol class="linenums"><li class="L0"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> grep </span><span class="str">"^[Ss].*"</span><span class="pln"> </span><span class="pun">/</span><span class="pln">proc</span><span class="pun">/</span><span class="pln">meminfo </span></code></li><li class="L1"><code class="language-sh"><span class="typ">SwapCached</span><span class="pun">:</span><span class="pln"> </span><span class="lit">0</span><span class="pln"> kB</span></code></li><li class="L2"><code class="language-sh"><span class="typ">SwapTotal</span><span class="pun">:</span><span class="pln"> </span><span class="lit">524284</span><span class="pln"> kB</span></code></li><li class="L3"><code class="language-sh"><span class="typ">SwapFree</span><span class="pun">:</span><span class="pln"> </span><span class="lit">524284</span><span class="pln"> kB</span></code></li><li class="L4"><code class="language-sh"><span class="typ">Shmem</span><span class="pun">:</span><span class="pln"> </span><span class="lit">4660</span><span class="pln"> kB</span></code></li><li class="L5"><code class="language-sh"><span class="typ">Slab</span><span class="pun">:</span><span class="pln"> </span><span class="lit">71412</span><span class="pln"> kB</span></code></li><li class="L6"><code class="language-sh"><span class="typ">SReclaimable</span><span class="pun">:</span><span class="pln"> </span><span class="lit">34888</span><span class="pln"> kB</span></code></li><li class="L7"><code class="language-sh"><span class="typ">SUnreclaim</span><span class="pun">:</span><span class="pln"> </span><span class="lit">36524</span><span class="pln"> kB</span></code></li><li class="L8"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> grep </span><span class="pun">-</span><span class="pln">i </span><span class="str">"^s.*"</span><span class="pln"> </span><span class="pun">/</span><span class="pln">proc</span><span class="pun">/</span><span class="pln">meminfo </span></code></li><li class="L9"><code class="language-sh"><span class="typ">SwapCached</span><span class="pun">:</span><span class="pln"> </span><span class="lit">0</span><span class="pln"> kB</span></code></li><li class="L0"><code class="language-sh"><span class="typ">SwapTotal</span><span class="pun">:</span><span class="pln"> </span><span class="lit">524284</span><span class="pln"> kB</span></code></li><li class="L1"><code class="language-sh"><span class="typ">SwapFree</span><span class="pun">:</span><span class="pln"> </span><span class="lit">524284</span><span class="pln"> kB</span></code></li><li class="L2"><code class="language-sh"><span class="typ">Shmem</span><span class="pun">:</span><span class="pln"> </span><span class="lit">4660</span><span class="pln"> kB</span></code></li><li class="L3"><code class="language-sh"><span class="typ">Slab</span><span class="pun">:</span><span class="pln"> </span><span class="lit">71412</span><span class="pln"> kB</span></code></li><li class="L4"><code class="language-sh"><span class="typ">SReclaimable</span><span class="pun">:</span><span class="pln"> </span><span class="lit">34888</span><span class="pln"> kB</span></code></li><li class="L5"><code class="language-sh"><span class="typ">SUnreclaim</span><span class="pun">:</span><span class="pln"> </span><span class="lit">36524</span><span class="pln"> kB</span></code></li></ol> |
7.显示etc/passwd文件中默认shell为非/sbin/nologin的用户；
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<ol class="linenums"><li class="L0"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> grep </span><span class="pun">-</span><span class="pln">v </span><span class="str">"/sbin/nologin"</span><span class="pln"> </span><span class="pun">/</span><span class="pln">etc</span><span class="pun">/</span><span class="pln">passwd</span></code></li></ol> |
8.显示etc/passwd文件中默认shell为/bin/bash的用户；
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<ol class="linenums"><li class="L0"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> grep </span><span class="str">"/bin/bash"</span><span class="pln"> </span><span class="pun">/</span><span class="pln">etc</span><span class="pun">/</span><span class="pln">passwd</span></code></li></ol> |
9.找出etc/passwd文件中的一位数或两位数；
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<ol class="linenums"><li class="L0"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> grep </span><span class="pun">-</span><span class="pln">E </span><span class="str">"\<([0-9]|[0-9][0-9])\>"</span><span class="pln"> </span><span class="pun">/</span><span class="pln">etc</span><span class="pun">/</span><span class="pln">passwd</span></code></li></ol> |
10.显示/boot/grub/grub.conf中至少一个空白字符开头的行；
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<ol class="linenums"><li class="L0"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos6 </span><span class="pun">~]#</span><span class="pln"> grep </span><span class="str">"^[[:space:]]\+.*"</span><span class="pln"> </span><span class="pun">/</span><span class="pln">boot</span><span class="pun">/</span><span class="pln">grub</span><span class="pun">/</span><span class="pln">grub</span><span class="pun">.</span><span class="pln">conf</span></code></li></ol> |
11.显示/etc/rc.d/rc.sysinit文件中以#号开头，后跟至少一个空白字符，而后又有至少一个非空白字符的行；
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<ol class="linenums"><li class="L0"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos6 </span><span class="pun">~]#</span><span class="pln"> grep </span><span class="str">"^#[[:space:]]\+[[:alnum:]]\+"</span><span class="pln"> </span><span class="pun">/</span><span class="pln">etc</span><span class="pun">/</span><span class="pln">rc</span><span class="pun">.</span><span class="pln">d</span><span class="pun">/</span><span class="pln">rc</span><span class="pun">.</span><span class="pln">sysinit </span></code></li></ol> |
12．打出netstat -tan命令执行结果中以‘LISTEN’,后或跟空白字符结尾的行；
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<ol class="linenums"><li class="L0"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> netstat </span><span class="pun">-</span><span class="pln">tan</span><span class="pun">|</span><span class="pln">grep </span><span class="str">"\<LISTEN[[:space:]]\+"</span></code></li></ol> |
13．添加用户bash,testbash,basher,nologin (此一个用户的shell为/sbin/nologin),而后找出当前系统上其用户名和默认shell相同的用户的信息；
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<ol class="linenums"><li class="L0"><code class="language-sh"><span class="pun">[</span><span class="pln">root@centos7 </span><span class="pun">~]#</span><span class="pln"> grep </span><span class="pun">-</span><span class="pln">E </span><span class="str">"(^[[:alnum:]]+\>).*\1$"</span><span class="pln"> </span><span class="pun">/</span><span class="pln">etc</span><span class="pun">/</span><span class="pln">passwd</span></code></li><li class="L1"><code class="language-sh"><span class="pln">sync</span><span class="pun">:</span><span class="pln">x</span><span class="pun">:</span><span class="lit">5</span><span class="pun">:</span><span class="lit">0</span><span class="pun">:</span><span class="pln">sync</span><span class="pun">:/</span><span class="pln">sbin</span><span class="pun">:/</span><span class="pln">bin</span><span class="pun">/</span><span class="pln">sync</span></code></li><li class="L2"><code class="language-sh"><span class="pln">shutdown</span><span class="pun">:</span><span class="pln">x</span><span class="pun">:</span><span class="lit">6</span><span class="pun">:</span><span class="lit">0</span><span class="pun">:</span><span class="pln">shutdown</span><span class="pun">:/</span><span class="pln">sbin</span><span class="pun">:/</span><span class="pln">sbin</span><span class="pun">/</span><span class="pln">shutdown</span></code></li><li class="L3"><code class="language-sh"><span class="pln">halt</span><span class="pun">:</span><span class="pln">x</span><span class="pun">:</span><span class="lit">7</span><span class="pun">:</span><span class="lit">0</span><span class="pun">:</span><span class="pln">halt</span><span class="pun">:/</span><span class="pln">sbin</span><span class="pun">:/</span><span class="pln">sbin</span><span class="pun">/</span><span class="pln">halt</span></code></li><li class="L4"><code class="language-sh"><span class="pln">bash</span><span class="pun">:</span><span class="pln">x</span><span class="pun">:</span><span class="lit">1002</span><span class="pun">:</span><span class="lit">1002</span><span class="pun">::/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">bash</span><span class="pun">:/</span><span class="pln">bin</span><span class="pun">/</span><span class="pln">bash</span></code></li><li class="L5"><code class="language-sh"><span class="pln">nologin</span><span class="pun">:</span><span class="pln">x</span><span class="pun">:</span><span class="lit">3005</span><span class="pun">:</span><span class="lit">3005</span><span class="pun">::/</span><span class="pln">home</span><span class="pun">/</span><span class="pln">nologin</span><span class="pun">:/</span><span class="pln">sbin</span><span class="pun">/</span><span class="pln">nologin</span></code></li></ol> |
原创文章，作者：N24_ViCi，如若转载，请注明出处：http://www.178linux.com/61011
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HA cluster应用—CoroSync+Pacemaker
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排版看着还不错，作业的步骤很详细，在完成作业的同时间，记得把知识做一汇总，巩固加深印象。