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tar -zxvf jdk-8u152-linux-x64.tar.gz

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mkdir -p /usr/local/java

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mv jdk1.8.0_152/ /usr/local/java/

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chown -R root:root /usr/local/java/

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vim /etc/environment

在第二行加入
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

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/etc/profile

修改为如下

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
#加入的语句
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
#加入的语句

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

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source /etc/profile

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java -version

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

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mv apache-tomcat-8.5.23 tomcat

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mv tomcat/ /usr/local/

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apt-get update

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apt-get install mysql-server

#安装途中需要设置root密码

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vim /etc/mysql/mysql.conf.d/mysqld.cnf

#注释掉如下行（前面加上#号）
bind-address = 127.0.0.1

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service mysql restart

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grant all privileges on *.* to 'root'@'%' identified by '你的 mysql root 账户密码';

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ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

使用如下设置即可

set global validate_password_policy=0;  //设置密码安全级别
set global validate_password_length=1;  //设置密码长度限制

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service mysql restart