Configure Linux server

Prerequisite: Select CentOs8 for this Linux distribution

Configure MySQL:

Open a terminal and log in to the system as the root user.

Use the following command to install the MySQL software source configuration package:

wget https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm  
rpm -Uvh mysql80-community-release-el7-3.noarch.rpm

Install MySQL server:
```
sudo yum install mysql-server 
```
Start the MySQL service and set it to start automatically at boot:
```
systemctl start mysqld sudo systemctl enable mysqld 
```
Check MySQL running status:
```
systemctl status mysqld
```
Enter MySQL:
```
mysql
```

Change password: (This is a MySQL statement)

ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'xxxxxx';

Re-enter MySQL:
```
mysql -uroot -p
```
Configure remote login: (for learning purposes only)

# Set up root remote login for the first time and configure the remote password using the following SQL command

CREATE USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '密码';

A password needs to be: more than 8 characters, with uppercase letters, special symbols, and cannot be a continuous simple statement such as 123, abc
# Use the following SQL command to modify the password later< /span>

ALTER USER 'root' @'%’IDENTIFIED WITH mysql_native_password BY '密码';

10.Authorization permissions:

GRANT ALL PRIVILEGES ON ProDB.* TO 'root'@'%';

Configure JDK:

1. Download jdk: Go to the official website to download, use jdk8 here

2. Upload to Linux cloud server: Upload to the /export/server directory here

3. Unzip:

tar -zxvf jdk-8u181-linux-x64.tar.gz

4. Configure the soft link of jdk:

ln -s /export/server/jdk1.8.0_351 /export/server/jdk

5. Configure Java environment variables and add them to path:

#编辑/etc/profile文件：
vim /etc/profile
#在文件末尾加入：
export JAVA_HOME=/export/server/jdk
export PATH=$PATH:$JAVA_HOME/bin

6. Validate environment variables:

source  /etc/profile

Configure Tomcat:

1. Create a new user to operate tomcat:

#创建tomcat用户
useradd tomcat
#切换tomcat用户
su - tomcat

2. Download tomcat:

wget https://dlcdn.apache.org/tomcat/tomcat-10/v10.0.27/bin/apache-tomcat-10.0.27.tar.gz

3. Unzip: (here still decompress to /export/server)

4. Configure soft links:

ln -s /export/server/apache-tomcat-8.5.95 /export/server/tomcat

5.Grant tomcat user permissions:

chown -R tomcat:tomcat tomcat
chown -R tomcat:tomcat apache-tomcat-8.5.95

6. Start tomcat:

#切换到tomcat/bin目录：
cd /export/server/tomcat/bin
#启动tomcat：
./startup.sh

7. Check whether the port is open:

netstat -anp | grep 8080

Configure Redis:

For CentOS 7.6:

1. Open the terminal and log in to the server as the root user or a user with sudo permissions.

2. Install the necessary dependent software packages. Run the following command to install the required dependency packages:

sudo yum install epel-release sudo yum install make gcc tcl git wget

3. Download the Redis source code. Use the wget command to download the stable version source code of Redis:

wget http://download.redis.io/releases/redis-5.0.13.tar.gz

4. Unzip the source code. Execute the following command to decompress the Redis source code:

tar xzf redis-5.0.13.tar.gz

5. Enter the Redis source code directory. Execute the following command to enter the Redis source code directory:

cd redis-5.0.13

6. Modify the src/server.h file. Open the server.h file using a text editor (such as vi or nano) and add the following line before line 1045:

#define __STDC_LIMIT_MACROS

Save and close the file after modifications.

7. Compile Redis. Execute the following command to compile Redis:

make

8. Install Redis. Execute the following command to install Redis:

sudo make install

9. After completing the installation, you can use the following command to start the Redis service:

sudo systemctl start redis

10. If you need to configure Redis to start automatically as a system service, please execute the following command:

sudo systemctl enable redis

Now, Redis is successfully installed and running on the server. You can test whether Redis is working properly by executing the following command:

redis-cli ping

If "PONG" is returned, it means that Redis has run successfully.