PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"
export JAVA_HOME=/usr/local/java/jdk1.8.0_152
export JRE_HOME=/usr/local/java/jdk1.8.0_152/jre
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib

Configure the user environment variables

vi /etc/profile

Add the following statement

if [ "$PS1" ]; then
  if [ "$BASH" ] && [ "$BASH" != "/bin/sh" ]; then
    # The file bash.bashrc already sets the default PS1.
    # PS1='\h:\w\$ '
    if [ -f /etc/bash.bashrc ]; then
      . /etc/bash.bashrc
    fi
  else
    if [ "`id -u`" -eq 0 ]; then
      PS1='# '
    else
      PS1='$ '
    fi
  fi
fi

export JAVA_HOME=/usr/local/java/jdk1.8.0_152
export JRE_HOME=/usr/local/java/jdk1.8.0_152/jre
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:$HOME/bin

if [ -d /etc/profile.d ]; then
  for i in /etc/profile.d/*.sh; do
    if [ -r $i ]; then
      . $i
    fi
  done
  unset i
fi

The user environment variables to take effect

source /etc/profile

Test whether the installation is successful

java -version

Here Insert Picture Description

Updated user environment variables for other users

su lusifer
source /etc/profile

Tomcat installation

Unzip and move to the specified directory

Upload jdk linux archive to the root directory
unzip

tar -zxvf apache-tomcat-8.5.23.tar.gz

Change directory name

mv apache-tomcat-8.5.23 tomcat

Mobile Directory

mv tomcat/ /usr/local/

Common Commands

start up

/usr/local/tomcat/bin/startup.sh

stop

/usr/local/tomcat/bin/shutdown.sh

Execute scripts within the directory

./startup.sh

Installing MySQL

download

Pack into the installation directory

cd /usr/local

Download MySQL

wget https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz

If the message -bash: wget: command not found error

yum install wget

unzip files

tar -zxvf mysql-5.7.25-linux-glibc2.12-x86_64.tar.gz

Rename

mv mysql-5.7.25-linux-glibc2.12-x86_64 mysql-5.7.25

Adding system mysql group and mysql user

groupadd mysql
useradd -r -g mysql mysql
#useradd -r参数表示mysql用户是系统用户，不可用于登录系统

Install Database

Create a data directory

cd mysql-5.7.25
mkdir data

The owner and owning group /usr/local/mysql-5.7.25 changed mysql

chown -R mysql.mysql /usr/local/mysql-5.7.25

Create a directory my_default.cnf in /usr/local/mysql-5.7.25/support-files

# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
# *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
# *** default location during install, and will be replaced if you
# *** upgrade to a newer version of MySQL.
 
[mysqld]
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES 
 
basedir = /usr/local/mysql-5.7.25
datadir = /usr/local/mysql-5.7.25/data
port = 3306
socket = /tmp/mysql.sock
character-set-server=utf8
 
log-error = /usr/local/mysql-5.7.25/data/mysqld.log
pid-file = /usr/local/mysql-5.7.25/data/mysqld.pid

Copy, if prompted to overwrite, y

cp support-files/my_default.cnf /etc/my.cnf

Initialization mysqld

cd /usr/local/mysql-5.7.25

./bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql-5.7.25/ --datadir=/usr/local/mysql-5.7.25/data/

After initialization is complete, view the log

/usr/local/mysql-5.7.25/data/mysqld.log

Remember temporary password:? A8 DQir = T + k +

[Note] A temporary password is generated for root@localhost: a8?DQir=T+k+

The startup script in the boot initialization directory

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

Start mysql service

service mysql start

Log mysql, password is the initial password

cd /usr/local/mysql-5.7.25
./bin/mysql -u root -p
# 输入上面的临时密码 a8?DQir=T+k+

change Password

mysql> set password=password('123456');
mysql> grant all privileges on *.* to root@'%' identified by '123456';
mysql> flush privileges;

Mysql restart to take effect

service mysql stop
service mysql start

service mysql restart

Deploy applications to a production environment (servers)

The project packaged into war package

mvn clean package

Upload war package to the linux /usr/local/tomcat/webapps/ROOTdirectory
Then /usr/local/tomcat/binstart tomcat

./startup.sh

Then in the browser to access the project will be a success

http://192.168.25.129:8080/

The more you know, the more you do not know.
Proper way without surgery, patients can still seek, there is no way to surgery, ending surgery.
If you have other questions, welcome message, we can discuss, learn together and progress together