• ubuntu 安装jdk8
• 七牛云存储拉取jdk8

wget http://qiniudns.2fei.top/jdk-8u212-linux-x64.tar.gz

root@VM-0-3-ubuntu:/usr/local# vim /etc/profile


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

if [ -d /etc/profile.d ]; then
  for i in /etc/profile.d/*.sh; do
    if [ -r $i ]; then
      . $i
    fi
  done
  unset i
fi
#jdk 安装目录
JAVA_HOME=/usr/local/java8
PATH=$JAVA_HOME/bin:$PATH
export JAVA_HOME PATH

#重启配置文件立即生效
source /etc/profile

#查看安装版本
root@VM-0-3-ubuntu:/usr/local# java -version
java version "1.8.0_212"
Java(TM) SE Runtime Environment (build 1.8.0_212-b10)
Java HotSpot(TM) 64-Bit Server VM (build 25.212-b10, mixed mode)