START
题目来源：http://blog.itpub.net/31544987/viewspace-2760587/
安装包：oracle-database-preinstall-19c-1.0-1.el7.x86_64.rpm
安装包来源：官网下载
测试环境：https://www.modb.pro/db/45596中的虚拟主机djtest
题目：
10、Choose three.
Which three actions are performed by the Oracle Preinstallation RPM, oracle-database-server-xxxx-preinstall, for Oracle Grid Infrastructure, where xxxx is the Oracle version and release?
A. performing checks to ensure minimum configuration requirements for Oracle Grid Infrastructure are met
B. creating the oracle OS user
C. creating the OSDBA (dba) group
D. creating thte oraInventory (oinstall) group
E. creating the grid OS user
F. configuring the OS for Oracle Automatic Storage Management shared storage access.
验证测试过程：
#转到快照before_mysql_ins
id oracle
#id: oracle: no such user
id grid
#id: grid: no such user
#上传安装包到/tmp
cd /tmp
yum -y localinstall oracle-database-preinstall-19c-1.0-1.el7.x86_64.rpm
##以下为安装(部分)输出
'''
Installed:
oracle-database-preinstall-19c.x86_64 0:1.0-1.el7
Dependency Installed:
bind-libs.x86_64 32:9.11.4-26.P2.el7_9.4
bind-utils.x86_64 32:9.11.4-26.P2.el7_9.4
compat-libstdc++-33.x86_64 0:3.2.3-72.el7
gssproxy.x86_64 0:0.7.0-29.el7
keyutils.x86_64 0:1.5.8-3.el7
ksh.x86_64 0:20120801-142.el7
libICE.x86_64 0:1.0.9-9.el7
libSM.x86_64 0:1.2.2-2.el7
libX11.x86_64 0:1.6.7-3.el7_9
libX11-common.noarch 0:1.6.7-3.el7_9
libXau.x86_64 0:1.0.8-2.1.el7
libXext.x86_64 0:1.3.3-3.el7
libXi.x86_64 0:1.7.9-1.el7
libXinerama.x86_64 0:1.1.3-2.1.el7
libXmu.x86_64 0:1.1.2-2.el7
libXrandr.x86_64 0:1.5.1-2.el7
libXrender.x86_64 0:0.9.10-1.el7
libXt.x86_64 0:1.1.5-3.el7
libXtst.x86_64 0:1.2.3-1.el7
libXv.x86_64 0:1.0.11-1.el7
libXxf86dga.x86_64 0:1.1.4-2.1.el7
libXxf86misc.x86_64 0:1.0.3-7.1.el7
libXxf86vm.x86_64 0:1.1.4-1.el7
libaio.x86_64 0:0.3.109-13.el7
libaio-devel.x86_64 0:0.3.109-13.el7
libbasicobjects.x86_64 0:0.1.1-32.el7
libcollection.x86_64 0:0.7.0-32.el7
libdmx.x86_64 0:1.1.3-3.el7
libevent.x86_64 0:2.0.21-4.el7
libini_config.x86_64 0:1.3.1-32.el7
libnfsidmap.x86_64 0:0.25-19.el7
libpath_utils.x86_64 0:0.2.1-32.el7
libref_array.x86_64 0:0.1.5-32.el7
libtirpc.x86_64 0:0.2.4-0.16.el7
libverto-libevent.x86_64 0:0.2.5-4.el7
libxcb.x86_64 0:1.13-1.el7
lm_sensors-libs.x86_64 0:3.4.0-8.20160601gitf9185e5.el7
nfs-utils.x86_64 1:1.3.0-0.68.el7
psmisc.x86_64 0:22.20-17.el7
quota.x86_64 1:4.01-19.el7
quota-nls.noarch 1:4.01-19.el7
rpcbind.x86_64 0:0.2.0-49.el7
smartmontools.x86_64 1:7.0-2.el7
sysstat.x86_64 0:10.1.5-19.el7
tcp_wrappers.x86_64 0:7.6-77.el7
xorg-x11-utils.x86_64 0:7.5-23.el7
xorg-x11-xauth.x86_64 1:1.0.9-1.el7
Dependency Updated:
bind-libs-lite.x86_64 32:9.11.4-26.P2.el7_9.4
bind-license.noarch 32:9.11.4-26.P2.el7_9.4
Complete!
'''
##输出完毕
#验证：
id oracle
#uid=54321(oracle) gid=54321(oinstall) groups=54321(oinstall),54322(dba),54323(oper),54324(backupdba),54325(dgdba),54326(kmdba),54330(racdba)
id grid
#id: grid: no such user
对比一下，可以看出：
pre安装包安装之后，创建了用户oracle,创建了组oinstall dba oper backupdba dgdba kmdba racdba
所以，选BCD
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