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Yesterday to Anhui Susong a customer there to maintain the experience and lessons The client's database server would have been good, and I was able to demonstrate to others how to install Oracle clients, install Oracle clients on the server, and halfway through the installation I suddenly felt I had found a great error: Oracle server could no longer install Oracle clients, I quit but it's too late: fee management system can not connect to the databas

:::22 :::* listen922/sshdtcp6 00::1:25 :::* listen1031/mastertcp60 0:::3306 :::* listen1667/mysqld If the template/etc/my.cnf is not configured, use the command line method:[[Emailprotected]mysql]#servicemysqldstopshuttingdownmysql]. success! [[Emailprotected]mysql]#/usr/local/mysql/bin/mysqld_safe--defaults-file=/etc/my.cnf --user=mysql--datadir=/data/mysql[1]1848[[emailprotected]mysql]# 18013122:45:06mysqld_safeLoggingto '/data/mysql/localhost.localdomain.err '. 18013122:45:06mysqld_safest

the where clause having . You can use exist and not exist instead of In and not. You can use table links instead of exist. Having can be replaced by where , if not replaced, can be handled in two steps. Example SELECT * from ORDERS WHERE customer_name not in (SELECT customer_name from CUSTOMER) Optimized SELECT * from ORDERS WHERE customer_name not exist (SELECT customer_name from CUSTOMER) 7.2 do not declare numbers in character format, you want to declare character values in numeri

database version select version ();• View database status show status;(data not all shown)• View each parameter show variables; Show variables like ' max_connect% ';Show variables;(Too many parameters)• Modify parameter set global max_connect_errors=1000;If you want to permanently take effect, you need to exit to SHELL,VIM/ETC/MY.CNF, define max_connect_errors=1000;• View queue show processlist; Show full processlist;If there are errors, please correct, learn from each other and progress togeth

rows affected (0.01 sec)• Completely delete the database:Drop database db1;mysql> drop Database db1; Query OK, 1 row affected (0.01 sec) 13.6 MySQL Database backup recovery• Backup library:Mysqldump-u User name-p password Database > backup data file path[Email protected] ~]# mysqldump-uroot-p123456 mysql >/tmp/mysql.sql(Too much data is not listed)• Recovery library:Mysql-u User name-p password Database [Email protected] ~]# mysql-uroot-p123456 MYSQL2 • Backup table:Mysqldump-u Use

the WHERE clause is used in the inch , not in , or or having . can use exist and the Not exist Replace inch and the not in . You can use table links instead exist . Having can be replaced by where , if not replaced, can be handled in two steps. ExampleSELECT * from ORDERS WHERE customer_name not in(SELECT customer_name from CUSTOMER)Optimized SELECT * from ORDERS WHERE customer_name not exist(SELECT customer_name from CUSTOMER)7.2 do not declare numbers in character format, you want to dec

10.28 Rsync Tools IntroductionThe file Synchronization tool rsync, can achieve incremental copy, CP is direct coverage, low efficiency;Install rsync, #yum-y install rsync;Rsync Common methods,Copy the passwd file to the/tmp directory, rename it to 1.txt, and the command to #rsync-av/etc/passwd/tmp/1.txt-V visualization;Remote copy, command for #rsync-av/etc/passwd [email protected]:/tmp/1.txt; then enter the password;10.29/10.30 rsync Common Options10.31 rsync sync via ssh-e Specifies the port,

14 weeks four sessions (May 14)16.1 Tomcat Introduction16.2 Installing the JDK16.3 Installing Tomcat16.1 Tomcat Introduction16.2 Installing the JDKOpen the download URL.Click jdk=8u144-linux-x64.tar.gz, downloadUpload to LinuxCtrl+f Open XftpPut the downloaded file in the root directoryXftp is an SSH-based port that does not require FTP to be opened.CopyAt the bottom, pasteCheck to see if the installation is successful, the following results appear, stating that there is no problem, the command

();-------------------------------------------------------------------curl-x127.0.0.1:80 test.com/upload/3.php //Can not parse, directly to the source code (written content) display/usr/local/nginx/sbin/nginx-t/usr/local/nginx/sbin/nginx-s Reloadcurl-x127.0.0.1:80 test.com/upload/3.php //Normal parsingTail/usr/local/nginx/logs/error.log//View error log12.16 Nginx AgentCd/usr/local/nginx/conf/vhostVim proxy.conf//Add the following:-----------------------------------------------------------------

Tags: Linux notes12 weeks three sessions (April 25)12.10 Nginx Access Log12.11 Nginx Log Cutting12.12 static files do not log logs and expire time12.10 Nginx Access LogThe format of the configuration file is in the main configuration file.Search for log to find the following paragraph, which is used to define the format.Public network IP, in Baidu, search IP, view.Defining Access Log pathsOpen FileUnder}, add a row to read as follows:12.11 Nginx Log CuttingEdit FileAdd the following contentProce

= ' date-d '-1 day +%y%m%d '//similar to 20180427, yesterday's date, today 28thLogdir= "/data/logs"Nginx_pid= "/usr/local/nginx/logs/nginx.pid"CD $logdirFor log in ' ls *.log 'DoMV $log $log-$dDone/bin/kill-hup ' Cat $nginx _pid '--------------------------------------------------------------------------------------Add Task Schedule #crontab-e//write the following:0 0 * * */bin/bash/usr/local/sbin/nginx_logrotate.sh//Daily 0 o'clock in the morning execution12.12 static files do not log logs and e

1. Determine the three things you most want to accomplish and invest 80% of the time. 2. You must strive for growth rather than survival. 3. No one tells you where to go. You must make your own decisions. 4. You can solve the problem only by looking at the problem. (Translation may be incorrect) 5. abilities are more important than academic qualifications. 6. You only have one choice, that is, success. Original article: Http://www.linkedin.com/today/post/article/20130301174219-17086692-6-

Self-study Android, regardless of whether the development environment is eclipse or Android Studio, and the Android SDK to deal with, as an Android small white, at the beginning of the installation of the Android development environment, suffering from a variety of egg pain problems, with the solution of various problems, There are some lessons to be learned, and now let's share it with you.Android Studio is Google's official launch of a professional

Original: http://googleresearch.blogspot.jp/2010/04/lessons-learned-developing-practical.htmlLessons learned developing a practical large scale machine learning systemTuesday, April,Posted by Simon Tong, GoogleWhen faced with a hard prediction problem, one possible approach are to attempt to perform statistical miracles on a small Training set. If data is abundant then often a more fruitful approach are to design a highly scalable learning system and

The title of the following ten articles was originally "10 lessons for young designers", which is John C Jay's ten lessons for young designers, but it is helpful to all normal young people, it has nothing to do with the designer profession, so I expanded the scope of the title without authorization and translated it in a bit. Ten lessons learned for young peopl

Java predecessors: Learning the experience and lessons learned from the EE process I'm here to talk about My Learning the Java EE process and the lessons learned in this process. So that later people less detours.Java development to now, according to the application to divide into three major chunks: J2se,j2me and Java EE. These three blocks complement each other and are used in different ranges.J2SE is the

Tags: learning methods Technical personnel how to learn public lessons OracleOpen Class Address: QQ Group 263409098public class Address: May 17, 2017 20 o'clockPublic Course Content:1. Where does it technology practitioners in the cloud era go?2. What kind of technical personnel does the enterprise need in the cloud era?3. How to become an annual salary (300,000 ~100 million) of high-paying people?4. What are the ways to learn Oracle database?5. What

This class, this semester we have only one of the three departments of this course, many many many students say why you have to choose this course. Parents also say, why don't you come with the crowd. Someone asked me before, whether regrets chose such a class, I said, regret. This course, which requires self-study and my student work, almost fills my own leisurely junior. Said regret that Thursday, I still for Lou big exam struggle, scratching the scalp, bite broken fingers, restless. Now, this

How to solve the grub error during startup-pain lessons-general Linux technology-Linux technology and application information. The following is a detailed description. If you have installed more than two systems (I am talking about Ubuntu), Grub will be used for guidance. I have tried this situation, when xp and ubuntu are started, grub loading please wait appears during startup ...... Error 17 or error 15 I have never seen such a situation before. W

During happy pregnancy, the APP has been unavailable for a few months, but there are still four to five users each day. Although the project failed, but in general, it is more successful than the previous debate project. Now let's summarize: Experience: 1. The product orientation must be urgent and helpful to users to solve users' actual problems. (Solve actual problems during pregnancy, and there are still users visiting each day) 2. products must meet users' psychological needs. (Through th