一、准备
先装jdk1.8
安装oracle-rdbms-server-11gR2-preinstall 包
a 进入yum 配置目录
[root@rac1 ~]# cd /etc/yum.repos.d/
b 下载yum 配置
[root@rac1 yum.repos.d]# wget http://public-yum.oracle.com/public-yum-ol7.repo
c 安装oracle-rdbms-server-11gR2-preinstall包
[root@rac1 ~]# yum install oracle-rdbms-server-11gR2-preinstall
其他依赖包
dnf install libnsl（不安会有jdk错误）
其他可能需要的包：
yum -y install xz wget gcc-c++ ncurses ncurses-devel \
cmake make perl openssl openssl-devel gcc* libxml2 \
libxml2-devel curl-devel libjpeg* libpng* freetype* \
make gcc-c++ cmake bison perl perl-devel perl perl-devel \
glibc-devel.i686 glibc-devel libaio readline-devel \
zlib.x86_64 zlib-devel.x86_64 libcurl-* net-tool* \
sysstat lrzsz dos2unix telnet.x86_64 iotop unzip \
ftp.x86_64 xfs* expect vim psmisc openssh-client* \
libaio bzip2 epel-release automake binutils bzip2 \
elfutils expat gawk gcc ksh less make openssh-server \
rpm sysstat unzip unzip cifs-utils libXext.x86_64 \
glibc.i686 binutils compat-libstdc++-33 \
elfutils-libelf elfutils-libelf-devel \
expat gcc gcc-c++ glibc glibc-common \
glibc-devel glibc-headers libaio \
libaio-devel libgcc libstdc++ libstdc++-devel \
make sysstat unixODBC unixODBC-devel libnsl
创建用户
oracle无法用root安装，这里创建用户oracle
useradd oracle
passwd oracle
赋予root权限：
修改 /etc/sudoers： ## Allow root to run any commands anywhere root ALL=(ALL) ALL oracle ALL=(ALL) ALL
/home/oracle下建文件夹oracle_11g
设置环境变量：
修改/home/oracle下的.bashrc
#vim /home/oracle/.bashrc
export ORACLE_BASE="/home/oracle/oracle_11g/app/oracle"
export ORACLE_HOME="/home/oracle/oracle_11g/app/oracle/product/11.2.0/dbhome_1"
export PATH=$PATH:$ORACLE_HOME/bin
export ORACLE_SID=orcl
export NLS_LANG="SIMPLIFIED CHINESE_CHINA.UTF8"
export PATH
刷新：source .bashrc
二、安装
跳出图形界面安装：
需要用Xmanager
create and config a database
server class
single instance database installation
advanced install
simplified Chinese
Enterprise edition
路径：上面设定好的ORACLE_BASE和ORACLE_HOME
Inventory路径：
general purpose
实例orcl orcl
memory
unicode
2020@xxxx
不能有特殊字符
安装过程可能遇到的问题：
ins_net_client.mk 错误
没装 make cmake gcc g++等，找上面的依赖包装上
ins_precomp.mk错误：
log里：/usr/lib64/libaio.so.1: undefined reference to `__stack_chk_fail@GLIBC_2.4'
把libaio.so.1替换为新的：https://www.cnblogs.com/jinzhenshui/p/9366002.html 注意替换libaio.so.1.0.1 ，查看软连接libaio.so.1要链接到新的so文件上
ins_ctx.mk错误：
log里：
找不到libstdc++.so.5 ： libstdc++.so.5 在compat-libstdc++-33 里： # yum install compat-libstdc++-33
然后替换libstdc++.so.5 .0.7 https://www.cnblogs.com/jinzhenshui/p/9365787.html
yum 安装时出现 Couldn t open file /etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
wget http://public-yum.oracle.com/RPM-GPG-KEY-oracle-ol7 -O /etc/pki/rpm-gpg/RPM-GPG-KEY-oracle
ins_emagent.mk错误：
logs：
db_home1/sysman/lib//libnmectl.a(nmectlt.o): In function `nmectlt_genSudoProps':
nmectlt.c:(.text+0x84): undefined reference to `B_DestroyKeyObject'
nmectlt.c:(.text+0x8d): undefined reference to `B_DestroyKeyObject'
nmectlt.c:(.text+0x96): undefined reference to `B_DestroyKeyObject'
nmectlt.c:(.text+0x9f): undefined reference to `B_DestroyKeyObject'
解决：
vim /home/oracle/oracle_11g/app/oracle/product/11.2.0/dbhome_1/sysman/lib/ins_emagent.mk
#找到如下内容后
$(SYSMANBIN)emdctl:
$(MK_EMAGENT_NMECTL)
进行修改为如下
$(SYSMANBIN)emdctl:
$(MK_EMAGENT_NMECTL) -lnnz11
三、创建用户
创建表空间：
create tablespace cjk_tablespace datafile '/home/oracle/oracle_11g/app/oracle/oradata/orcl/cjk_data.dbf' size 30G autoextend on maxsize unlimited;
create tablespace bzk_tablespace datafile '/home/oracle/oracle_11g/app/oracle/oradata/orcl/bzk_data.dbf' size 30G autoextend on maxsize unlimited;
create tablespace bfk_tablespace datafile '/home/oracle/oracle_11g/app/oracle/oradata/orcl/bfk_data.dbf' size 30G autoextend on maxsize unlimited;
创建用户：
create user usr_cjk identified by xxxx2020 default tablespace cjk_tablespace;
grant connect,resource to usr_cjk;
create user usr_bzk identified by xxxx2020 default tablespace bzk_tablespace;
grant connect,resource to usr_bzk;
create user usr_bfk identified by xxxx2020 default tablespace bfk_tablespace;
grant connect,resource to usr_bfk;