登录oracle官网，搜索19c，点击第一条

点击左下角的ownload Database 19c

本文下载的是rpm版本

下载预安装环境wget https://yum.oracle.com/repo/OracleLinux/OL7/latest/x86_64/getPackage/oracle-database-preinstall-19c-1.0-1.el7.x86_64.rpm

执行安装命令sudo rpm -ivh oracle-database-preinstall-19c-1.0-1.el7.x86_64.rpm

显示缺少依赖包

sudo yum install -y gcc-c++ make

sudo  yum install -y ksh

sudo yum install -y sysstat

sudo yum install libaio-devel

compat-libstdc++-33及compat-libcap1通过yum下载不到

百度搜索找到一个网址下载

http://mirror.centos.org/centos/7/os/x86_64/Packages/compat-libstdc++-33-3.2.3-72.el7.x86_64.rpm

http://mirror.centos.org/centos/7/os/x86_64/Packages/compat-libcap1-1.10-7.el7.x86_64.rpm

rpm -ivh compat-libstdc++-33-3.2.3-72.el7.x86_64.rpm

rpm -ivh compat-libcap1-1.10-7.el7.x86_64.rpm

ok，环境若还缺的朋友可以通过yum把配置补全

sudo rpm -ivh oracle-database-preinstall-19c-1.0-1.el7.x86_64.rpm

sudo rpm -ivh oracle-database-ee-19c-1.0-1.x86_64.rpm

sudo /etc/init.d/oracledb_ORCLCDB-19c configure

要等挺久的

netstat -nultp | grep -E '1521|5500'

ps -ef | grep -i orcl | grep -v grep

至此安装完成。

安装完后自然是连接

切换到root用户

vim .bash_profile

加上export ORACLE_HOME=/opt/oracle/product/19c/dbhome_1

export PATH=$PATH:/opt/oracle/product/19c/dbhome_1/bin

export ORACLE_SID=ORCLCDB

切换到oracle用户，执行 sqlplus / as sysdba