JT-day10

1、 Linux Project deployment instructions

1.1 Deployment flowchart

1.2 Linux install Mysql database

yum install mariadb-server install mariadb database
yum clean all Empty the installation file
Data activation ：
Start command systemctl start mariadb
Restart command systemctl restart mariadb
The shutdown command systemctl stop mariadb
Database initialization operation
command : `mysql_secure_installation’

Linux visit Mysql database

Instructions for linking databases
explain :

1. If you need to remotely link to the database, you have to go through the firewall
2. If you link the database remotely , Remote access must be enabled in the database , Otherwise, reject the link .

Configuration database permissions configuration instructions

To configure Linux Database permissions

Switch Mysql database

Modify the database table
1). Check the data sheet

2). Inquire about user In the table host/root/password

3). take host=“localhost” Change it to "%"

4). Refresh database permissions

Check firewall status
command : firewall-cmd --state

Manually turn off the firewall
explain : Manually shut down the firewall by command
command :

1. systemctl stop firewalld.service   # close 
2. systemctl start firewalld.service  # Turn on 

service iptables restart

firewall-cmd --reload

1.3 modify jt-manage Configuration of

1.3.1 Modify the upload address of the picture

explain ： stay Linux Directory specifies a directory where images are stored

1.3.2 Project packaging and release

1.3.3 Upload war Package file

Start the server
java -jar 8081.war

adopt IP You can visit the address

1.4 tomcat Cluster deployment

1、 You can use & operator Continue to execute commands

java -jar 8031.war & java -jar 8032.war & java -jar 8033.war &

1.4.1 How to shut down the server

ps -ef |grep java        see java Keyword process 
kill -9  Port number            Kill process 
JSP                      Retrieve only java service 

1、"|" The Conduit   The result of the previous query of the pipeline , As a parameter after the pipe ( Conditions ) To operate 
2、kill  Kill process 
   kill PID Number   Normal shutdown process ( Weak closing )
   kill -15 PID Number   Must close , But you can do the following 
   kill -9  PID Number   closed   No time for follow-up tasks 

1.4.2 About Linux Background start

explain ： adopt java -jar 8033.war Way to start , It can only be performed at the front desk , If you close the linked terminal , Then the program will close with it , So it needs to be turned on Linux Background operation
command ：

nohup java -jar 8031.war =>8031.log &
nohup java -jar 8032.war =>8032.log &
nohup java -jar 8033.war =>8033.log &

1.4.3 About view command learning

cat  Output all the contents of the file 
more  Output all the contents of the document , Paging output , Space for the next screen ,q sign out 
less  Usage and more identical , Only by PgUp、PgOn Key to control 
tail  Used to display the number after the file , Frequently used 
tail -10 nginx.conf  see nginx.conf Last 10 That's ok 
tail –f nginx.conf  Dynamic view log , It is convenient to view the new information in the log 
ctrl+c  End of view 

1.5 The script to start tomcat The server

explain ：Linux The script in is generally used in shell Script
step ：

1、 edit start.sh Script file for 
    vim start.sh         create a file 
    

2、 Specify the header of the script

3、 The content of the specified script

4、 Execute the script