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• Windows7如何访问Documents and Settings文件夹
  2021-07-30
   

  在Windows 7系统下系统盘中的Documents and Settings文件夹属于系统保护文件，默认情况是隐藏的且拒绝读取，平时显示时文件夹上还带有一把小锁！在使用Windows 7系统的时候，需要对文件夹进行清理，如何设置才能访问该文件夹呢？

  1.右键点击系统盘下的Documents and Settings文件夹，选择属性。（需先设置文件夹选项可查看隐藏文件）

  

  2.在属性窗口中，点击“安全”栏下的“高级”选项

  

  3.在弹出的窗口中点击拒绝类型后的“Everyone”，然后点击“更改权限”

  

  4.在弹出的窗口中。点击拒绝类型后的“Everyone”，然后点击“删除”

  

  5.点击允许类型后的“Everyone”，然后点击“编辑”

  

  6.在弹出的窗口中勾选“完全控制”的允许项，然后点击确定

  

  7.回到该窗口下点击“确定”进入下一步

  

  8.回到该窗口下点击“确定”进入下一步

  

  9.回到该窗口下点击“确定”即可正常访问该文件夹。

  

• Ubuntu18.04系统如何用arpd收集arp信息
  2021-07-28
   

  在ubuntu18.04中如何用arpd收集arp信息呢？本文给出详细说明。

  1.指定arpd数据库文件，默认位置为 /var/tmp/arpd.db

  arpd -b arpd数据库文件

  2.将arp数据库内容打印并退出进程

  arpd -l -b arpd数据库文件

  

  
  
  

• Ubuntu18.04系统如何用rmmod命令从当前运行的内核中移除指定的内核模块
  2021-07-29
   

  在ubuntu18.04中如何用rmmod命令从当前运行的内核中移除指定的内核模块呢？本文给出详细说明。

  语法：

  rmmod(选项)(参数)

  选项：

  -v：显示指令执行的详细信息；

  -f：强制移除模块，使用此选项比较危险；

  -w：等待着，直到模块能够被除时在移除模块；

  -s：向系统日志（syslog）发送错误信息。

  参数：

  要移除的模块名称。

  实例：

  1.查看当前系统加载的模块

  lsmod

  

  2.删除floppy模块

  rmmod floppy

  

  3.再次查看加载的模块

  lsmod

  

  floppy模块已被删除

   

• Windows7如何限制访问指定磁盘
  2021-07-31
   

  Windows 7系统下如何限制访问指定磁盘呢？

  1.打开“运行”，输入gpedit.msc，点击“确定”，打开本地组策略编辑器

  

  2.按用户配置→管理模板→Windows组件→Windows资源管理器，进入到如图所示界面，找到“防止从‘我的电脑’访问驱动器”，双击进入设置

  

  3.在弹出的窗口中点选“已启用”。如果要限制C盘的使用，选中“仅限制驱动器C”，就可以了。如果希望关闭所有驱动器，可以选择“限制所有驱动器”。设置后点击“确定”即可

  

• "可信网站"验证提供哪些特色认证的注册？
  2020-07-04

  <p style="margin: 10px 0px; padding: 0px; box-sizing: border-box; line-height: 1.5;">目前我们提供25种特色认证。</p> <p style="margin: 10px 0px; padding: 0px; box-sizing: border-box; line-height: 1.5;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</p> <table style="border-collapse: collapse; table-layout: fixed; padding: 0px; margin: 10px 0px; line-height: 1.5; border-top: 1px solid #cccccc; border-left: 1px solid #cccccc;"> <tbody style="padding: 0px; margin: 0px; box-sizing: border-box;"> <tr class="firstRow" style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">序号</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">认证、资质名称</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">1</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">ISO系列的体系认证</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">2</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">国家免检产品</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">3</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">3C认证（中国强制产品认证）</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">4</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">自愿性产品认证</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">5</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">CE产品认证</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">6</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">授权经销商</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">7</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">工程设计资质证书</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">8</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">中国良好农业规范认证</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">9</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">中国有机产品认证</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">10</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">食品安全管理体系认证</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">11</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">中国食品质量认证</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">12</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">HACCP认证（危害分析和关键控制点）</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">13</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">中国绿色市场认证</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">14</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">中国无公害农产品认证</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">15</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">绿色食品认证</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">16</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">中国饲料产品认证</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">17</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">出口食品生产企业卫生备案</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">18</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">食品生产许可证</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">19</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">工业产品生产许可证</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">20</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">CB产品认证</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">21</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">E/e Mark</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">22</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">中国特种设备相关认证</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">23</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">REACH认证（关于化学品注册、评估、授权与限制制度）</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">24</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">药品GSP认证（良好供应规范）</td> </tr> <tr style="padding: 0px; margin: 0px; box-sizing: border-box;"> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">25</td> <td style="margin: 0px; padding: 3px 5px; box-sizing: border-box; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc;">GMP认证（药品生产质量管理规范）</td> </tr> </tbody> </table> <p style="margin: 10px 0px; padding: 0px; box-sizing: border-box; line-height: 1.5;">&nbsp;</p>

• Ubuntu18.04系统如何用readonly命令定义和显示只读的shell变量和shell函数
  2021-07-29
   

  在ubuntu18.04中如何用readonly命令定义和显示只读的shell变量和shell函数呢？本文给出详细说明。

  语法：

  readonly(选项)(参数)

  选项：

  -f：定义只读函数；

  -a：定义只读数组变量；

  -p：显示系统中全部只读变量列表。

  参数：

  变量定义：定义变量，格式为变量名=‘变量值’。

  实例：

  1.显示所有只读变量

  readonly -p

  

  2.定义只读变量

  readonly 变量名

  

• Ubuntu18.04系统如何使用nethogs命令按进程实时统计网络带宽利用率
  2021-07-28
   

  NetHogs是一个开源的命令行工具（类似于Linux的top命令），用来按进程或程序实时统计网络带宽使用率。在ubuntu18.04中如何安和使用nethogs工具呢？本文给出详细说明。

  1.首先更新软件列表

  sudo apt update

  

  2.安装git工具

  sudo apt install nethogs

  

  3.使用nethogs

  nethogs

  

• Ubuntu18.04系统如何安装ClamAV
  2021-07-27
   

  ClamAV是一个在命令行下查毒软件，因为它不将杀毒作为主要功能，默认只能查出您计算机内的病毒。在ubuntu18.04中如何安装ClamAV呢？本文给出详细说明。

  1.首先更新软件列表

  sudo apt update

  

  2.安装ClamAV

  sudo apt install clamav

  

  3.测试是否安装成功

  clamscan -V

  

• Centos7.6如何连接PPTP
  2021-09-24

  Centos7.6如何连接PPTP？

  1.输入

  yum install ppp pptp pptp-setup -y

  ，按回车键执行安装

  

  2.执行如下命令，连接PPTP服务端，查看此时分配的网卡名，如图为ppp1

  pptpsetup --create PPTP名字 --server PPTP地址 --username 用户名 --password 密码 --encrypt --start

  

  3.输入

  ip route replace default dev ppp1

  ，按回车键增加默认路由，其中ppp1为上一步查看的网卡名

  

  4. 输入ping IP或网址，按回车键测试通连正常即可

  

  5.输入

  curl http://httpbin.org/ip

  ，按回车键可查看当前上网的IP地址

  

  6.输入

  pkill pptp

  ，按回车键可以断开PPTP连接

  

   

• 如何解决Centos6.10无法yum install
  2021-08-03

  1.登陆服务器

  

  2.输入命令：

  yum -y install wget

  时会发现无法安装

  

  3.输入命令：

  vi /etc/yum.repos.d/CentOS-Base.repo

  

  4.这时我们需要注释掉所有的 mirrorlist，取消所有的 baseurl 注释

  

  5.将 baseurl 中的mirrorlist.centos.org 改为 vault.centos.org

  

  6.输入命令

  yum -y install wget 

  就可以正常安装了