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Linux lessons next day study notes

: '/etc/lvm/backup ': Permission deniedFind: '/etc/lvm/cache ': Permission deniedFind: '/etc/selinux/targeted/modules/active ': Permission deniedFind: '/etc/audit ': Permission deniedFind: '/ETC/POLKIT-1/RULES.D ': Permission deniedFind: '/etc/polkit-1/localauthority ': Permission deniedFind: '/etc/firewalld ': Permission deniedFind: '/ETC/GRUB.D ': Permission deniedFind: '/etc/ipsec.d ': Permission deniedFind: '/etc/audisp ': Permission deniedFind: '/etc/vmware-tools/guestproxydata/trusted ': P

"From zero play to python+ AI-3" 120,122 lessons depth Priority question Answer

CBA this order put;"Group master" King (501562071) 2018/5/29 11:29:18Instead, you have advanced to the left, some advanced to the right of the parent class, the guiding principle is to ensure that the final "left-to-right", and the reverse derivation, according to the nature of the stack or queue should be how to go to that level of the parent class. Just that part; the inverse derivation of the final result is not complete: my phone 16:58:44Class B and C at around 11:40 in the 122 session are

"Notice" "Algorithm Design and Analysis" experimental class, theoretical lessons, test time, add points and other arrangements and personal goals set

exchange with classmates, some students plan to participate in the summer vacation IT training, assuming that there is no goal, but also do not exclude computer programming students, can consider a bit. Of course, it is best to find your own "talent", to do their favorite thing to do. See the blog about the ultimate solution of the junior and wandering-now can move; want to learn management or it aspects of the students, if you want to borrow books, can see whether the teacher has been purchase

30 Lessons from writing Java code

writing code. Clear-minded design provides easy-to-understand procedures, but annotations, detailed explanations, and some examples are often invaluable. They are very important to you, and to those who are later. If you're still skeptical, think about the frustration of trying to find useful information from an online Java document that might persuade you.(29) If you think you have done a good analysis, design or implementation, then please change the angle of thinking a little bit. try inviti

51cto C + + million concurrent network communication engine architecture and implementation video lessons

: high-frequency concurrency, multithreading, multi-process, thread pool, memory pool, software hardware bottlenecks, how to test the optimization of network processing capabilities and other technical knowledge. Can be applied on Windows, Linux, Android, iOS systems.It is very helpful for front-end developers who are engaged in high-performance network processing. suitable for real-time communication servers, game servers, server, blockchain, artificial intelligence and other needs of the field

Free public Lessons-0 basic small white how to start your own Python operation Road (Mr. Wangjin)

Instructor Homepage: http://edu.51cto.com/lecturer/7787419.html"Teacher Wangjin"Microsoft Certified Gold Lecturer, senior Microsoft Technical expert, Microsoft pre-sales consultant. With more than seven years of experience in Microsoft teaching and project experience, in the course to integrate a wealth of business case, so that the course more practical, coupled with humorous atmosphere of the course, so that students in the joy of learning, case understanding, practice in improving. Open Cla

Python learning-eight weeks five lessons (December 15)

,)) #创建写进程 pr = Process(target=read, args=(q,)) #创建读进程 pw.start() pr.start() pw.join() pr.terminate() # pr进程里是死循环,无法等待其结束,只能强行终止;terminate方法实现if __name__ == ‘__main__‘: main()#结果:put a to queue.put b to queue.put c to queue.put d to queue.2. Message Queuing PIPE The Pipe method return (CONN1,CONN2) represents the two end of a pipeline. The pipe method has the duplex parameter, if the duplex parameter is True (the default), then the pipeline is full

Robot Learning Cornerstone (Machine learning foundations) Learn the cornerstone of the work after three lessons to solve the problem

seem to be too many to write multiple logistic regression article. So I found the relevant information on a foreign site, but did not see the derivation process. The URL is: http://blog.datumbox.com/machine-learning-tutorial-the-multinomial-logistic-regression-softmax-regression/. He did it according to Wunda's theory, where J (Theta) is what we call the Ein.(3) Answer: the second17. Question 17th、(1) Test instructions: The meaning of this problem is that we know from the 16 of the Ein method o

Beginner C # and MVC some tips, detours, summaries, and lessons (2)--About the entity Framework

?"": B.menuname};Splat a run, the problem comes again ....My model is clearly placed in the Models.Staff.Menu, when the EF is not going to give me the full name of the Dal, and then tell me I can't relate the entity or what .... In short, it is automatically give me the name space to change .....For the novice of me, Baidu Google tinkering half a day did not solve the problem ...Backstage Help the Great God, the great God said, you see this is a problem, not the problem of EF, but your own think

20171124_python study six weeks five lessons (November 24)

(name) : Gets the value of all keys in the hash corresponding to namehvals (name) : Gets the value of all values in the hash of the name corresponding to#!/usr/bin/env python#-*-Coding:utf-8-*-Import RedisPool = Redis. ConnectionPool (host= ' 192.168.10.128 ', port=6379)R = Redis. Redis (Connection_pool=pool)R.hmset (' Test ', {' K1 ': ' v1 ', ' K2 ': ' V2 '})Print (R.hkeys (' Test '))Print (r.hvals (' Test '))#结果:[B ' K2 ', B ' K1 '][B ' v2 ', B ' v1 ']hexists (Name,key) : Check if the hash na

Python Four week five lessons

commands, such as Commands.getoutput (' ls/tmp/')Commands.getstatusoutput (): Used to execute shell commands and return status codes after command executionFour, sys moduleSys.exit (): Used to exit the entire scriptSys.stdin.read (): For receiving standard input, waiting for keyboard input after executionSys.stdout.write (): Used to output standard output, such as Sys.stdout.write (' Hello ') will print out Hello, default non-newline characterSys.stderr.write (): Used to output standard error o

2018-3-7 11 weeks 2 Lessons limited to a directory prohibit parsing PHP, restricting user_agent, PHP-related configuration

different virtual hosts• Limit different open_basedir for different virtual hostsWith Php_admin_value Open_basedir "/data/wwwroot/111.com:/tmp/" to limit the directory, and for a number of different virtual hosts to restrict different open_basedir, you can use the first virtual host above to limit(Why take temporary files?) Because the default temporary files under/tmp/, so that even temporary files are not written)[Email protected] php-7.1.6]# curl-a "a4l"-x127.0.0.1:80 111.com/2.php123[[email

First development sharing lessons learned _ sharing

In the company to do a development of sharing, share in the development process of some of the experience gained. Despite his confidence, he was hit hard after the speech, and despite the lack of recognition of the effect, many lessons were learned.Inaccurate positioning. I will share the theme of "development", hoping to "impart" some thoughts and methods that I think are very important, but obviously too optimistic. Although two heavyweight executiv

Express air freight volume greater than the weight of lessons

case of an amount of 125 kilograms, if the empty duty per kilogram is 100 yuan, then the Air Company will charge you 12. 500 yuan instead of 2,000 yuan Oh. If you only report 2,000 dollars to the guests, and then want to add to the difference, or to change the price, the guests are not necessarily willing to accept. Because the quote once the signature of the seal is a promise, if the number of changes in a pile, the report is not counted, not only affect the reputation of the business, but al

Installation lessons for Windows 7 RC

Here I want to organize, share the experience of Windows 7 installation lessons, I hope to help. Download: Windows 7 Release Candidate (RC) http://www.mininova.org/tor/2560296 First, choose a good installation method You have now downloaded the ISO image and burned it to a DVD. Next you have two options to run the installer. The difference in the performance of Windows Installer depends on which way you choose. If your system is already installed

45 Lessons (LNMP architecture Introduction, MySQL installation, PHP installation, Nginx introduction)

/php.ini Edit php-fpm.conf [[emailprotected] php-5.6.32]# cd /usr/local/php-fpm/etc/ ##到这个目录下来[[emailprotected] etc]# vim php-fpm.conf ##这个目录没有php-fpm.conf文件vim直接创建编辑,编辑这个配置文件到https://coding.net/u/aminglinux/p/aminglinux-book/git/blob/master/D15Z/php-fpm.conf里拷贝样例 Configuration file Content Explained [global] ##全局的参数pid = /usr/local/php-fpm/var/run/php-fpm.pid ##PID定义路径error_log = /usr/local/php-fpm/var/log/php-fpm.log ##log路径[www]

51 Lessons (Set change root password, connect MySQL, MySQL common commands)

, through this parameter can be very clear know the current system query memory is sufficient, is more, or not enough, we can make adjustments according to the actual situation. In general, 4G memory setting 64M is sufficient. 8) thread_cache_size indicates that the number of threads stored in the cache can be re-used, referring to the following values:1g-> 8 2g-> 3g-> >3G-> 64In addition, there are a few more key parameters: 9) Thread_concurrency This value is set to twice times the number of C

13 weeks Four lessons change the root password, MySQL connection, common commands

current database version select version (); View database status Show status; View each parameter show variables; Show variables like ' max_connect% '; (where% is a wildcard character) Modify the parameter set global max_connect_errors=1000; (this is only a temporary change, if you want to restart after the reset is still the value of our changes, then we have to quit MySQL, and then change the MYSQL.CNF configuration files under Linux. ) View queue show Processlist; Show full processlist; this

2018-4-2 15 weeks 1 lessons MySQL master-slave configuration

different for replication to work.Check whether the/data/mysql/auto.cnf uuid of the master and slave server is the same, if you delete one and restart the server again, the change master operation from server MySQL will succeed. 17.5 testing master-Slave synchronizationDefined in MY.CNF: can be in the Lord, or in theOn the primary serverbinlog-do-db=//Synchronize only the specified libraries, multiple can be used, to splitbinlog-ignore-db=//Ignore specified libraryFrom the serverre

Two small lessons about MongoDB API

written by C + + programs, the Java program can be fetching read, and vice versa.Toss half a day after finding the reason: the Java API reads with the DOC.GETXXXX (String) method, regardless of the order.mongocursor collection.find (docfilter). iterator (); while (Cursor.hasnext ()) { = cursor.next (); // reading order does not matter int col2 = Doc.getinteger ("COL2"). Intvalue (); long col3 = Doc.getlong ("COL3"). Longvalue ();

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