Installation of oracle19c under alicloud lightweight application server linux-centos7

Initial environment ： Alicloud lightweight application server has reset the system to CentOS7.3-64 position
Specific goals ： install Oracle Database 19c

First step ： Check Linux System version

1. Carry out orders lsb_release -a Check the system version

You can see , My current system version is CentOS7.3-64 position .
2. To make sure that everything is OK , I'm going to upgrade my system to the latest .
3. use yum updates
Carry out orders yum -y clean all
Carry out orders yum -y update
At last I saw “Complete!” The update is complete .
4. After the update is complete , Carry out orders lsb_release -a Check the system version

You can see , Now my system version is CentOS7.7-64 position .

The second step ： download Oracle19c Installation package

1. Download. oracle-database-ee-19c-1.0-1.x86_64.rpm This file .
2. because Oracle Slow download on official website , So the following Baidu SkyDrive link is provided .
link : https://pan.baidu.com/s/1QDDFUGPu39kh7ObmHQTF2g Extraction code : leaf
3. Interested partners can also be in Oracle Download on the official website , Remember to sign up before downloading Oracle account number .
https://www.oracle.com/database/technologies/oracle-database-software-downloads.html#19c

The third step ： download Oracle19c Pre installation package for

1. Download. oracle-database-preinstall-19c-1.0-1.el7.x86_64.rpm This file .
2. This file is put on the top of the Baidu network disk link .
link : https://pan.baidu.com/s/1QDDFUGPu39kh7ObmHQTF2g Extraction code : leaf
3. Interested partners can also be in Oracle Download on the official website , This can be downloaded without login , And the file size is small , Go fast .
http://yum.oracle.com/repo/OracleLinux/OL7/latest/x86_64/getPackage/oracle-database-preinstall-19c-1.0-1.el7.x86_64.rpm

Step four ： Upload to Linux

1. We have downloaded these two files to local .

2. utilize Xftp Upload to Linux Of root Catalog , Can't use Xftp Please use the mount to 、 Download and other ways to get Linux above root Go to the catalogue .
After uploading , our root There are two files in the directory .

Step five ： Start installation

1. stay root Under the table of contents , Carry out orders yum -y localinstall oracle-database-preinstall-19c-1.0-1.el7.x86_64.rpm,
Conduct Oracle19c Pre installation of .
At last I saw “Complete!” It's just that the pre installation is complete .

2. stay root Under the table of contents , Carry out orders yum -y localinstall oracle-database-ee-19c-1.0-1.x86_64.rpm,
Conduct Oracle19c Installation .
At last I saw “Complete!” The installation is finished , This may be a little slow , It's recommended to have a cup of hot water , Just wait patiently .

Step six ： Configuration environment

1. initialization Oracle database , Carry out orders /etc/init.d/oracledb_ORCLCDB-19c configure ,
It's really a long process , I suggest taking a nap , A good rest is really good .

Finally, seeing this sentence means that this step is a success .
2. modify root User password , Remember this step , Otherwise you will regret .
Carry out orders passwd , Type twice 123456, That's all right. .

3. Configure environment variables , Switch to oracle Under the user .
Carry out orders su - oracle,
Carry out orders vi .bash_profile,
Add the following to the document ：

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

Save and exit .
Check if the modification is correct , Carry out orders cat .bash_profile.

Carry out orders source .bash_profile.

Step seven ： Using a database

1. Sign in oracle database , Carry out orders sqlplus / as sysdba.

2. Enter the database statement to confirm that the database statement can execute normally ,
show pdbs;

3. Change the user name to system The password for 123456,
alter user system identified by 123456;

4. Be careful ：
stay root Under the authority of user , You need to enter an account and password to enter the database ;
stay oracle Under the authority of user , No need to enter account and password to enter the database .

Step eight ： The solution of some small problems

1.Oracle Backspace key failure , Unable to delete

stay oracle Edit under user folder bash_profile file ,
Carry out orders vi .bash_profile;
Add the following code ：

stty erase ^h

Save and exit , Make the change effective , Carry out orders source .bash_profile

2.Oracle The problem that the up and down keys can't call up the history

(1) install readline and libtermcap-devel Two dependency packages , Switch to root user .
Carry out orders yum -y install readline* libtermcap-devel*
(2) download rlwrap,
from github download rlwrap,
https://github.com/hanslub42/rlwrap/releases
Of course , We also offer Baidu online , Just before Oracle In the folder .
link : https://pan.baidu.com/s/1QDDFUGPu39kh7ObmHQTF2g Extraction code : leaf
Namely rlwrap-0.43.tar.gz This file .
And then upload it to root Just below the table of contents .

(3) decompression 、 compile 、 install rlwrap
tar -zxvf rlwrap-0.43.tar.gz
cd rlwrap-0.43
./configure && make && make install


(4) To configure shell
su - oracle
vim .bash_profile
Finally, add the following configuration , send oracle Related commands support up and down keys ：

alias sqlplus='rlwrap sqlplus'
alias rman='rlwrap rman'
alias lsnrctl='rlwrap lsnrctl'

Save and exit , Make the change effective , Carry out orders source .bash_profile

Be careful ： This up and down key or only in oracle Under user authority oracle Use in the database .

3.Oracle The uninstall

(1) Switch to oracle Under the authority of user , Carry out orders su - oracle;

(2) Switch to oracle Of deinstall Catalog , Carry out orders
cd /opt/oracle/product/19c/dbhome_1/deinstall

(3) function deinstall file , Carry out orders ==./deinstall==

(4) In the process of deletion, there are several points to confirm ：( All the other things I didn't mention came back )
Specify the list of database names that are configured in this Oracle home [orcl]:
Specify the name of the database to be deleted , The default can be , Directly enter .

The details of database(s) orcl have been discovered automatically. Do you still want to modify the details of orcl database(s)? [n]:
Do you need to modify the database details , Default n, Directly enter .

Do you want to continue (y - yes, n - no)? [n]: y
Whether or not to continue , Fill in y, enter

End of script , Tips need to use root The user deletes the following three scripts .
rm -rf /etc/oraInst.loc
rm -rf /opt/ORCLfmap
rm -rf /etc/oratab

thus ,Oracle Delete completed .

(5) Carry out orders su Then enter the password to switch to root Under the authority of user .

Step nine ： Colored eggs -Navicat Connect Oracle database

1. Alibaba cloud firewall added 1521 port


Otherwise, the following mistakes will occur ：ORA-12170

2. Service name query
Enter the query statement in the database ,
select global_name from global_name;

I am here ORCLCDB, Remember this .
3.Navicat newly build Oracle Connect

Don't Scribble the service name , Otherwise, the following mistakes will occur ：ORA-12514

Or the service name is wrong , When choosing SID when , There will be the following mistakes ：ORA-12505

The service name is written correctly , choice SID You can also connect successfully .

disclaimer ：
1. The purpose of writing this article is to learn better Oracle Installation , If the interests of the people concerned are harmed , Please contact to delete ;
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This article comes from ：https://blog.csdn.net/testleaf/article/details/105303336
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