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1原创 大数据安全考试提纲
1、大数据安全概念及目标2、传统访问控制技术和基于密码的访问控制技术。3、角色挖掘的算法4、对称密码，非对称密码，hash算法的原理及作用5、密文索引的基本思想，及设计6、身份认证技术及实现......
2022-06-05 18:19:10
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原创 无人机实验平台开发随笔（三）NOKOV Seeker软件配置
考虑到在上一篇文章中分析的结论，对于nokov和平台核心组件的数据传输反而可以放在相对次要的位置了，毕竟就算通过手动输入坐标也是可行的方案。先前对硬件进行的调试，有必要进行一个总结，公司给予的文档中对问题的估计有限，基本上是要求用户按部就班来操作的，有些设置却没有写清楚，如果不去咨询客服难以知道设置方法，网络上也鲜有资料，希望写出来可以解决后续使用者的疑问。Seeker和硬件系统的连接一套动作捕捉系统由8台摄像机，若干连接线和交换机，一系列用于定位的marker反光点还有标定杆组成（一套包括L标
2022-04-20 19:20:00
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原创 无人机实验平台开发随笔（二）
困难与解构：在实际开发过程中，通信问题成为了第一阶段最为严肃的问题，在解除了各类与机器人和无人机相关领域的知识之后，随着对项目功能认识的深入，也逐渐感觉到了强烈的无力感。首先，先不论一个实验平台本身的可拓展性能否满足要求，先前对“仿真软件”的认知可谓是过于浅薄，所谓仿真软件本身就是在硬件较为昂贵，实验难度较大的前提下进行前期验证的，而并非是一个仅仅用于显示飞行轨迹的图形化工具，实际上如果真的要开发无人机的仿真软件，对其姿态的建模，对物理效果的模拟都是没法欠缺的，也正是如此才使得仿真软件能够一定程度上
2022-04-19 22:18:18
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原创 Linux Kernel VFS-Read（2）
I choose the cover pic just because it's silly and got read in it.In this part, we'll talk about how read in vfs is connected to that in file systems.
2021-12-25 18:32:00
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原创 Linux Kernal VFS-System Call：Read
After openning a file, it's time to read or write.
2021-12-16 23:59:12
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原创 Linux Kernal VFS-Open(4)
If not finished however, we know that name now holds a component in the middle slashed of the pathname.
2021-12-07 23:58:45
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原创 Linux Kernal VFS-Open(3)
path_openat()Path_openat() is function that search for files by path in order to fill a file struct.The procedure for searching is based on a structure we disscussed before, which is struct nameidata.Nameidata is a temporary variable and it not only save
2021-11-30 23:58:36
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原创 Linux Kernal VFS-Open()(2)
Now we've known what fd is, how does fd function remains unseen.Start with function open(), we shall discuss about how actually those operations to files finally happens.#i
2021-11-25 23:58:58
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原创 Linux Kernal VFS-System Call open()
2021SC@SDUSCSystem calls and structsFrom this blog that is also the 6th we start to discuss about the operations to structures we mentioned about beforesuch as file struct, inode, dentry as well as superblocks.Back to the first blog we analyse the mai.
2021-11-15 23:50:18
328
原创 Linux Kernal VFS-Struct file
Discussed about inode and dentry, it finally comes to struct file, although it's not like a real file we've talked about.Actually, inodes are related to the real file and the kernal use it to operate with all files in need, not struct file.For file system
2021-11-04 17:13:14
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原创 Linux Kernal FS-inode&files(4)
2021SC@SDUSCinode(2)We've talked about inodes, so what are we doing here.After reading some blogs from several great coders, I finally notice that I am far from ultimately understand such structure, so I would like to start with inodes again about some
2021-10-28 22:50:36
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原创 Linux Kernal FS-inode&dentry(2)
2021SC@SDUSCInodeWhile superblocks stand for each file systems,Inodes stand for every file and each file has an inode which include all information for kernal to operate those files.Be aware that even every file being used has an inode block to operate
2021-10-19 23:46:01
178
原创 Linux Kernal FS-SuperBlock(1)
The first part of the artical has nothing to do with our topic, please pay attention.Trying to start the topic of file system in Linux kernal is difficult for me.So It's better to start with a story.Also I have to announce that I am not writting a techni
2021-10-10 23:54:52
231
原创 Linux Kernal File System-Get Started
2021SC@SDUSCFile System--We know its there, but how can we get any closer to it?Without file system, everything fade in the shadow.by feilongz.Linux OS were considered to be the most popular OS in the world while plenty of devices and systems run w
2021-09-30 05:00:11
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