little leaps learning system

Environment : Centos7+hadoop2.5.2+hive1.2.1+mysql5.6.22+indigo Service 2 train of thought : Hive load log →hadoop distributed execution → requirement data into MySQL Note : Hadoop log Analysis System on the Internet a lot of data, but most of them have to write a small problem, can not run smoothly, but this article has been personally validated, can be coherent. It also includes a detailed explanation of the exceptions that may be encountered and rel

. Learning Linux, is the actual combat, the theory is one thing, the actual combat can embody the value of the theory, a more thorough understanding of the basic principles of the theory.Maybe someone will tell you there are other windows, but this window of Linux is certainly the most utopian and idealistic, especially in a society where there is nowhere to bow to reality.After two years of exposure to open source, as an ordinary user rather than a d

[[emailprotected] ~]# umount /mnt/ 卸载mnt目录上的文件系统[[emailprotected] ~]# btrfs-convert -r /dev/sdb1 将btrfs降级为ext4文件系统rollback complete. 提示降级成功[[emailprotected] ~]# blkid /dev/sdb1 查看sdb1的信息，为ext4文件系统降级完成/dev/sdb1: UUID="84965289-5f82-4fe3-b0e7-6160726d7a25" TYPE="ext4" [[emailprotected] ~]# btrfs-convert /dev/sdb1 再次升级为btrfs文件系统creating btrfs metadata.creating ext2fs image file.cleaning up system chu

-p and-i if unknown:-S,--kernel-name print the kernel name-N,--nodename print the network node hostname-R,--kernel-release print the kernel release-V,--kernel-version print the kernel version-M,--machine print the machine hardware name-P,--processor print the processor type or "Unknown"-I,--hardware-platform print the hardware platform or "unknown"-O,--operating-system print the operating system--help Displ

note the messageWarning/warn # may affect system functionality and need to alert users of important eventsErr/error # error messageCrit # more serious.Alert # must be dealt with immediately.Emerg/panic # will cause the system to be unavailable* # indicates all log levelsNone # is the opposite of *, it means nothing.Location of the action (action) log recordAbsolute path on

understand, and multiprocessor instruction system how to achieve, and the single processor how much difference, there are many problems to understand, after all, is now a beginner, hehe. Now we start with a summary of the three methods for Uc/os-ii to handle critical section code. The reason why I wrote so many big paragraphs before, mostly I don't understand why uc/os-ii in the implementation of the critical section of the problem is only to use the

Operating System Concepts Learning Note 9 Thread overviewA single process can include multiple control threads.Thread--a basic unit of CPU utilization, which is the basis of forming multi-threaded computer.A thread is the basic unit used by the CPU and consists of a thread ID, a program counter, a collection of registers, and a stack. It shares code snippets, data segments, and other operating

Objective:This series is in the author's study "Machine Learning System Design" ([Beauty] willirichert) process of thinking and practice, the book through Python from data processing, to feature engineering, to model selection, the machine learning problem solving process one by one presented. The source code and data set designed in the book have been uploaded t

forget) Ls–l List all content in the current directory (Files \ Folders)PWD Displays the name of the current directoryCD changes the directory of the current operationWHO displays the current user nameClear Clear Screenmkdir Create a new directoryTouch to create a new file (the file does not exist before it is created)Open opens a file \ FolderClick the TAB key to automatically complement the instruction name, file name, folder name, etc.(The above instructions can be found in the specific use

信息Setfacl-x g:student File # #删除列表中的student用户组信息Setfacl-b File # #关闭列表5.mask permission ThresholdIf you perform chmod on a file with a permission list, it is likely that the mask in this permission list will be modifiedMask is the maximum permission value that a particular user can getSetfacl-m m: Permissions # #修改该mask的值6. Default PermissionsWhen we need to create a new file or directory in the specified directory that has special permissions for the specified userSetfacl-m d:u:username: Permis

= (gameobject) Instantiate (prefab, new Vector3 (0, 0, 0), transform.rotation);UILabel AddLabel = Addscore. GetcomponentSystem.Random Random = new System.Random ();Random score.add = random. Next (50, 100);Addlabel.text = "" + add;Get Tweenposition ObjectTweenposition TWEENP = Addscore. GetcomponentSets the coordinate value of to, which is the value of the Ngui coordinate system, so you need to reverse the world coordinate value transform. Inversetra

Reference article link: http://www.jianshu.com/p/2eebd6ad284d Since taking part in the electronic design competition has always wanted to learn more about the embedded knowledge, but their own learning without direction, until recently participated in an embedded training plan to start Linux under the program began to learn. The small white computer originally system WIN10 plan to install Ubuntu dual

System Learning hash Algorithm (hash algorithm) Reprint please indicate the source. Preface: The origin of the "system learning hash Algorithm" in this paper. After seeing the " 11, thoroughly parse hash table algorithm from beginning to end" This article, the original text does not have blizzard hash fast reason a

, 32768fragmentspergroup8192inodespergroupsuperblockbackups storedonblocks:32768,98304,163840,229376,294912,819200,884736, 1605632 is writing inode table: complete creatingjournal (32768blocks): complete writing superblocksandfilesystemaccountinginformation: Complete Thisfilesystemwill beautomaticallycheckedevery29mountsor180days,whichever comesfirst.usetune2fs-cor-itooverride. [[emailprotected]~]# 650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/72/F0/wKioL1XwS8XSERK2AAOGqYLMqrs004.jp

Niu Yun's news publishing system has entered another environment for me to learn from the original C/S to the current B/S. the biggest change is the change of the interface, which moves the user interface to the browser. this is another practice and learning of MVC programming in the previous stage. Now we are nearing the end of the niugu news and publishing system