linux (center OS7) Install JDK tomcat and mysql to build the running environment of java web project
- 2021-07-10 21:18:41
- OfStack
1. Install JDK
1. Uninstall the old version or the JDK that comes with the system
(1) List all installed JDK
rpm -qa | grep jdk
(2) Uninstall unnecessary JDK
yum -y remove 安装包名称
2. Download and unzip JDK
(1) Download the installation package
Enter the/usr/local directory to create a new java directory
mkdir java
From the Java directory, use the wget directive to download the installation package, such as
wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u141-b15/336fa29ff2bb4ef291e347e091f7f4a7/jdk-8u141-linux-x64.tar.gzOr use the shell tool to upload to linux locally.
(2) Unzip the installation package
After downloading, use the command to unzip,
tar -zxvf 压缩包名称
3. Configure environment variables
Enter the/etc/folder to edit the profile file (Global Environment Variable Configuration) using the vim profile Command Editor. If there is no profile file, go to/root for configuration. bash_profile file (environment variable configuration under current user) Add the following configuration at the end of the file: (If you are worried about modification errors, you can use ps command to back up the file)
export JAVA_HOME=jdk Root directory of installation package
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/jre/lib/rt.jar Finally, don't forget to carry out orders
source /etc/profile
Make the configuration file effective.
Enter java-version to see if the JDK configuration was successful. The JDK installation configuration is complete when the version information appears.
2. Install tomcat
2. Download and unzip tomcat
(1) Download the installation package
Enter the/usr/local directory to create a new mywork directory
mkdir mywork
From the mywork directory, download the installation package using the wget directive, such as
wget "http://mirrors.tuna. tsinghua. edu. cn/apache/tomcat/tomcat-8/v8.5. 49/bin/apache-tomcat-8. 5.49. tar.gz"
Or use the shell tool to upload to linux locally.
(2) Unzip the installation package
After downloading, use the command to unzip,
tar -zxvf 压缩包名称
3. Start tomcat
Enter the tomcat home directory, start tomcat, and use the command
bin/startup.sh
To see if tomcat started successfully (if the process exists), use the command
ps -ef | grep tomcat
4. Check to see if tomcat is installed successfully
(1) View firewall status
systemctl status firewalld
Use the command when the above command is invalid
yum -y remove 安装包名称0
(2) Turn off the linux firewall
systemctl stop firewalld
Use the command when the above command is invalid
service iptables stop
(3) View ip address information for linux
ifconfig
(4) Access tomcat
Browser input address, http://ip Address: 8080
3. Install mysql
1. Uninstall the system's own database mariadb
yum list installed | grep mariadb (See if the system has installed mariadb )
yum -y remove Application name (uninstall mariadb ) 2. Download and unzip mysql
(1) Download the installation package
Go to the/usr/local directory and use the wget instruction to download the installation package, such as
wget "http://dev.mysql.com/get/Downloads/MySQL-5. 7/mysql-5. 7.17-linux-glibc2.5-x86_64. tar. gz"
Or use the shell tool to upload to linux locally.
(2) Unzip the installation package
After downloading, use the command to unzip,
tar -zxvf 压缩包名称
Change the file name after unzipping,
mv 解压文件名 mysql
3. Create a data warehouse directory
mkdir /mysql/data （此目录存放数据库数据）
4. Create mysql users and user groups
groupadd mysql (Create User Groups)
useradd -r -s /sbin/nologin -g mysql mysql -d /usr/local/mysql (Will mysql Users are added to the group and specified for the user mysql Directory) 5. Specify the owner of the directory
Enter into mysql Root directory
cd /usr/local/mysql
Change the directory owner,
chown -R mysql . (Don't forget the following . )
chgrp -R mysql .
chown -R mysql /mysql/data
6. Initialize mysql configuration parameters
In mysql Root directory,
bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/mysql/data
Note: After the command is executed, an initial password is generated at the end, which is copied to Notepad for later first login.
Set up data encryption,
bin/mysql_ssl_rsa_setup --datadir=/mysql/data
7. Modify the system configuration file
Will mysql Configuration file is added to the system configuration file and entered into the directory
cd /usr/local/mysql/support-files
Copy,
cp my-default.cnf /etc/my.cnf
cp mysql.server /etc/init.d/mysql
Edit mysql Configuration file, specifying the base directory and data directory,
vim /etc/init.d/mysql
Modify the following properties:
basedir=/usr/local/mysql
datadir=/mysql/data
8. Change your password
Start mysql ,
/etc/init.d/mysql start --5.0 Version is mysqld start
Login,
mysql -h localhost -u root -p
Enter the ( 6 ) Step to get the password. If it appears: -bash :mysql :commond not found Execute: ln -s /usr/local/mysql/bin/mysql /usr/bin -- Create command soft connection
Change the password,
set password=password(' The password you want to set ')
9. Modify remote host operation permissions for root users
Give all hosts all permissions
grant all privileges on *.* to 'root'@'%' identified by 'root';
Make permissions effective
flush privileges;
View user table permissions
use mysql;
select * from user;
10. Add system environment variables
vim /etc/profile
Add at the end:
export JAVA_HOME=jdk Root directory of installation package
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/jre/lib/rt.jar
Make the configuration file effective
source /etc/profile
11. Remote Connection Testing
You can use the mysql client tool to connect remotely. If the connection fails, you can close the firewall and try again.
Additional:
Check the running status of mysql,
service mysql status--Version 5.0 is service mysqld status
Stop mysql,
service mysql stop--Version 5.0 is service mysqld stop
Start mysql
service mysql start--Version 5.0 is service mysqld start
Restart mysql
service mysql restart--Version 5.0 is service mysqld restart
mysql can be configured in detail by modification/etc/my. cnf.
The above is to build a simple linux project running environment steps, if you find errors or improper, welcome to comment correction, supplement.
Summarize
The above is the linux (center OS7) introduced by this site to install JDK, tomcat and mysql to build the running environment of java web project, hoping to help everyone!