Linux Installation JDK + Tomcat + MySQL tutorial

java -version

rpm -qa|grep java

rpm -e --nodeps java-1.6.0-openjdk-devel-1.6.0.0-1.50.1.11.5.el6_3.x86_64
rpm -e --nodeps tzdata-java-2012j-1.el6.noarch
...

cd /usr/local/java
tar -zxvf jdk-8u161-linux-x64.tar.gz

rm -rf jdk-8u161-linux-x64.tar.gz

vim /etc/profile

# jdk1.8.0_161

JAVA_HOME=/usr/local/java/jdk1.8.0_181
JRE_HOME=$JAVA_HOME/jre
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
export JAVA_HOME JRE_HOME PATH CLASSPATH

source /etc/profile

java -version

sudo find / -name *tomcat*

ps -ef |grep tomcat

root     15721 15602  0 10:13 pts/0    00:00:00 grep tomcat

3. Install Tomcat

Will download the good… Tomcat tar.gz Upload the file to the server’s / usr / local / tomcat, CD to the directory, and execute the decompression command:

cd /usr/local/tomcat
tar -zxvf apache-tomcat-8.5.39.tar.gz 

After successful decompression, get the folder

Apache-tomcat-8.5.39, renamed Tomcat

mv apache-tomcat-8.5.39 tomcat

Remove installation files (not required)

rm -rf apache-tomcat-8.5.39.tar.gz

4. Configure environment variables

Edit / etc / profile file

vim /etc/profile

Add the following configuration at the end:

# Tomcat

CATALINA_HOME=/usr/local/tomcat
export CATALINA_HOME

Reload the / etc / profile file to take effect:

source /etc/profile

5. Configure Tomcat catalina.sh file

Enter Tomcat bin directory

cd $CATALINA_HOME/bin

Editor catalina.sh file

vim catalina.sh

Locate ා OS specific support, and add the following configuration below this line:

CATALINA_HOME=/usr/local/tomcat/tomcat
JAVA_HOME=/usr/local/java/jdk1.8.0_181

Save and exit.

6. Install Tomcat service

cd $CATALINA_HOME/bin
cp catalina.sh /etc/init.d/tomcat

7. Start & test Tomcat

Start Tomcat

cd $CATALINA_HOME/bin
./startup.sh

If there is no problem with the above, enter 192.168.23.37:8080 in the local browser to open the Tomcat home page.

8. Set the power on and auto start

When the server is shut down and restarted, the service can not start itself with the computer startup. Then we can set the Tomcat service to boot.

Open the file of Linux boot settings, and write the following configuration file to the end of this file. Note that it is the last of the file. If you want to add other booting files in the future,

It can only be added before this. In a word, the following sentence should be kept at the end of the document.

Open the boot file / etc / RC. D/ rc.local

vi /etc/rc.d/rc.local

Add the following code:

#Java configuration environment variables
export JAVA_HOME=/usr/local/java/jdk1.8.0_181
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin
#Tomcat configuration environment variable
export CATALINA_HOME=/usr/local/tomcat/tomcat
#Tomcat auto start
/usr/local/tomcat/tomcat/bin/startup.sh

Tomcat relies on Java’s JDK, so JDK is also imported synchronously.

After completing the above steps, you can shut down CentOS and restart it to check.

3、 Install MySQL

1. MySQL relies on libaio, so install libaio first

yum install libaio

2. Check whether MySQL is installed

yum list installed | grep mysql

If installed, uninstall first

yum -y remove mysql-libs.x86_64

Check MySQL installed in other ways

rpm -qa | grep mysql

If so, use the RPM – e command or the RPM – E — nodeps command to uninstall

Name checked by RPM - e MySQL ා normal deletion mode
RPM - E -- nodeps check the name ා strong delete mode. If you use the above command to delete other files, you can use this command to forcibly delete them

After deletion, we can check whether MySQL has been successfully unloaded by using the RPM – QA | grep MySQL command!!

3. Install mysql

MySQL official website Yum source RPM installation package: http://dev.mysql.com/downloads/repo/yum/

3.1 download MySQL GZ source installation package

mysql-5.7.26-linux-glibc2.12-x86_64.tar.gz

3.2 copy to / usr / local / MySQL Directory:

3.3 decompression:

tar xvf mysql-5.7.26-linux-glibc2.12-x86_64.tar.gz

3.4 name modification:

tar xvf mysql-5.7.26-linux-glibc2.12-x86_64.tar.gz

4. Create users and user groups

groupadd mysql

useradd -r -g mysql mysql

The purpose is to modify the installation authorityMySQLThe owner of the directory ismysqlUser of groupMySQLgroup

chown -R mysql .

chgrp -R mysql .

6. Initialize the database

  bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql/mysql --datadir=/usr/local/mysql/mysql/data

This is my file directory. Under / usr / local / MySQL, you can store it as you like.. It’s OK to modify it.

6.1 after initialization, there will be an initialization password. Write it down in Notepad

6.2 generating configuration files

vim /etc/my.cnf

[mysqld]
basedir = /usr/local/mysql/mysql
datadir = /usr/local/mysql/mysql/data
socket = /usr/local/mysql/mysql/mysql.sock
port = 3306
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
[client]
socket = /usr/local/mysql/mysql/mysql.sock

6.3 configuring MySQL service

cp /usr/local/mysql/mysql/support-files/mysql.server /etc/init.d/mysql

  chmod +x /etc/init.d/mysql

  chkconfig --add mysql

6.4 configure environment variables

Open/Etc / profile file, and fill in the following at the end

vim /etc/profile

# mysqlexport MYSQL_HOME=/usr/local/mysql/mysqlexport PATH=$PATH:$MYSQL_HOME/bin:$MYSQL_HOME/lib

Make environment variables work

source /etc/profile

7. Start mysql

service mysql start

8. Change initial password

mysql -u root -p

Enter the initial password and log in to MySQL (the password is changed and saved, and copy and paste when entering, the password will not be displayed on the console!! )

Change password

alter user'root'@'localhost' identified by 'root'

vim /etc/my.cnf

Add under [mysqld]

skip-grant-tables

(this means to skip the authority verification and log in without password)

Then save and exit,

Restart MySQL

Log in again with the new password.