Adding swap space in Linux

Adding swap space in Linux


[root@ip-anurag grid]#
[root@ip-anurag grid]#
[root@ip-anurag grid]# free -g
              total        used        free      shared  buff/cache   available
Mem:              3           0           0           0           2           2
Swap:             0           0           0
[root@ip-anurag grid]#
[root@ip-anurag grid]# dd if=/dev/zero of=/swap_file bs=2G count=1
0+1 records in
0+1 records out
2147479552 bytes (2.1 GB) copied, 29.8424 s, 72.0 MB/s
[root@ip-anurag grid]# chmod 600 /swap_file
[root@ip-anurag grid]# mkswap /swap_file
Setting up swapspace version 1, size = 2097144 KiB
no label, UUID=9bd76b65-4abe-4ffb-a580-d4e9283daac2
[root@ip-anurag grid]#
[root@ip-anurag grid]# swapon /swap_file
[root@ip-anurag grid]#
[root@ip-anurag grid]# vi /etc/fstab
[root@ip-anurag grid]#

[root]# swapon --show

NAME       TYPE SIZE USED PRIO

/swap_file file   2G   0B   -2

[root@ip-10-0-1-12 ~]#

/swap_file               swap                    swap    defaults        0 0

[root@ip-anurag grid]#
[root@ip-anurag grid]# free -m
              total        used        free      shared  buff/cache   available
Mem:           3787         655        2274          16         857        2898
Swap:          2047           0        2047
[root@ip-anurag grid]#
[root@ip-anurag grid]#

Oracle 19c installation on Linux 8 : error while loading shared libraries: libnsl.so.1: cannot open shared object file: No such file or directory

Error while starting ./runInstaller for oracle 19c installation on Linux 8




[oracle@ip-192-168-43-225 oracle]$ ./runInstaller
/u01/oracle/perl/bin/perl: error while loading shared libraries: libnsl.so.1: cannot open shared object file: No such file or directory
[oracle@ip-192-168-43-225 oracle]$

Solutions: error while loading shared libraries: libnsl.so.1: cannot open shared object


In addition, we need to install below RPM after that start the Oracle 19c installation.


dnf install -y libnsl
dnf install -y libnsl.i686
dnf install -y libnsl2
dnf install -y libnsl2.i686




further, follow below link to complete the oracle database installation 

https://anuragkumarjoy.blogspot.com/2020/04/oracle-database-19c-step-by-step.html


[oracle@ip-192-168-43-225 ~]$ sqlplus "/as sysdba"

SQL*Plus: Release 19.0.0.0.0 - Production on Mon Apr 13 18:56:09 2020
Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle.  All rights reserved.


Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0

SQL> select name ,open_mode from v$database;

NAME      OPEN_MODE
--------- --------------------

INDIA     READ WRITE

[oracle@ip-192-168-43-225 ~]$ cat /etc/redhat-release
Red Hat Enterprise Linux release 8.0 (Ootpa)
[oracle@ip-192-168-43-225 ~]$

19c Database Installation on Linux 8 fails with Error [INS-08101] Unexpected error while executing the action at state:'SupportedOSCheck'

19c Database Installation fails with Error:[INS-08101] Unexpected error while executing the action at state:'SupportedOSCheck'


Define below parameter before start ./runInstaller for oracle 19c installation on Linux 8




export CV_ASSUME_DISTID=RHEL7.6


To avoid below error :

further, follow below link to complete the oracle database installation 

https://anuragkumarjoy.blogspot.com/2020/04/oracle-database-19c-step-by-step.html


[oracle@ip-192-168-43-225 ~]$ sqlplus "/as sysdba"

SQL*Plus: Release 19.0.0.0.0 - Production on Mon Apr 13 18:56:09 2020
Version 19.3.0.0.0

Copyright (c) 1982, 2019, Oracle.  All rights reserved.


Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.3.0.0.0

SQL> select name ,open_mode from v$database;

NAME      OPEN_MODE
--------- --------------------

INDIA     READ WRITE

[oracle@ip-192-168-43-225 ~]$ cat /etc/redhat-release
Red Hat Enterprise Linux release 8.0 (Ootpa)

[oracle@ip-192-168-43-225 ~]$

Oracle support doc


19c Database/client Installation fails with Error:[INS-08101] Unexpected error while executing the action at state:'clientSupportedOSCheck' (Doc ID 2584365.1)

How to Install 19c Database Software in Silent Mode with Response File

How to Install 19c Database Software in Silent Mode with  Response File

Response File for software_only

###################################################################
###################################################################
###################################################################

####################################################################
## Copyright(c) Oracle Corporation 1998,2019. All rights reserved.##
##                                                                ##
## Specify values for the variables listed below to customize     ##
## your installation.                                             ##
##                                                                ##
## Each variable is associated with a comment. The comment        ##
## can help to populate the variables with the appropriate        ##
## values.                                                        ##
##                                                                ##
## IMPORTANT NOTE: This file contains plain text passwords and    ##
## should be secured to have read permission only by oracle user  ##
## or db administrator who owns this installation.                ##
##                                                                ##
####################################################################


#------------------------------------------------------------------------------
# Do not change the following system generated value. 
#------------------------------------------------------------------------------
oracle.install.responseFileVersion=/oracle/install/rspfmt_dbinstall_response_schema_v19.0.0

#-------------------------------------------------------------------------------
# Specify the installation option.
# It can be one of the following:
#   - INSTALL_DB_SWONLY
#   - INSTALL_DB_AND_CONFIG
#-------------------------------------------------------------------------------
oracle.install.option=INSTALL_DB_SWONLY

#-------------------------------------------------------------------------------
# Specify the Unix group to be set for the inventory directory.  
#-------------------------------------------------------------------------------
UNIX_GROUP_NAME=oinstall

#-------------------------------------------------------------------------------
# Specify the location which holds the inventory files.
# This is an optional parameter if installing on
# Windows based Operating System.
#-------------------------------------------------------------------------------
INVENTORY_LOCATION=/u01/app/oraInventory

#-------------------------------------------------------------------------------
# Specify the complete path of the Oracle Base. 
#-------------------------------------------------------------------------------
ORACLE_BASE=/u01/app/oracle

#-------------------------------------------------------------------------------
# Specify the installation edition of the component.                     
#                                                             
# The value should contain only one of these choices.  
      
#   - EE     : Enterprise Edition 
                               
#   - SE2     : Standard Edition 2


#-------------------------------------------------------------------------------

oracle.install.db.InstallEdition=EE
###############################################################################
#                                                                             #
# PRIVILEGED OPERATING SYSTEM GROUPS                                          #
# ------------------------------------------                                  #
# Provide values for the OS groups to which SYSDBA and SYSOPER privileges     #
# needs to be granted. If the install is being performed as a member of the   #
# group "dba", then that will be used unless specified otherwise below.       #
#                                                                             #
# The value to be specified for OSDBA and OSOPER group is only for UNIX based #
# Operating System.                                                           #
#                                                                             #
###############################################################################

#------------------------------------------------------------------------------
# The OSDBA_GROUP is the OS group which is to be granted SYSDBA privileges.
#-------------------------------------------------------------------------------
oracle.install.db.OSDBA_GROUP=dba

#------------------------------------------------------------------------------
# The OSOPER_GROUP is the OS group which is to be granted SYSOPER privileges.
# The value to be specified for OSOPER group is optional.
#------------------------------------------------------------------------------
oracle.install.db.OSOPER_GROUP=dba

#------------------------------------------------------------------------------
# The OSBACKUPDBA_GROUP is the OS group which is to be granted SYSBACKUP privileges.
#------------------------------------------------------------------------------
oracle.install.db.OSBACKUPDBA_GROUP=dba

#------------------------------------------------------------------------------
# The OSDGDBA_GROUP is the OS group which is to be granted SYSDG privileges.
#------------------------------------------------------------------------------
oracle.install.db.OSDGDBA_GROUP=dba

#------------------------------------------------------------------------------
# The OSKMDBA_GROUP is the OS group which is to be granted SYSKM privileges.
#------------------------------------------------------------------------------
oracle.install.db.OSKMDBA_GROUP=dba

#------------------------------------------------------------------------------
# The OSRACDBA_GROUP is the OS group which is to be granted SYSRAC privileges.
#------------------------------------------------------------------------------
oracle.install.db.OSRACDBA_GROUP=dba
################################################################################
#                                                                              #
#                      Root script execution configuration                     #
#                                                                              #
################################################################################

#-------------------------------------------------------------------------------------------------------
# Specify the root script execution mode.
#
#   - true  : To execute the root script automatically by using the appropriate configuration methods.
#   - false : To execute the root script manually.
#
# If this option is selected, password should be specified on the console.
#-------------------------------------------------------------------------------------------------------
oracle.install.db.rootconfig.executeRootScript=false

#--------------------------------------------------------------------------------------
# Specify the configuration method to be used for automatic root script execution.
#
# Following are the possible choices:
#   - ROOT
#   - SUDO
#--------------------------------------------------------------------------------------
oracle.install.db.rootconfig.configMethod=
#--------------------------------------------------------------------------------------
# Specify the absolute path of the sudo program.
#
# Applicable only when SUDO configuration method was chosen.
#--------------------------------------------------------------------------------------
oracle.install.db.rootconfig.sudoPath=

#--------------------------------------------------------------------------------------
# Specify the name of the user who is in the sudoers list. 
# Applicable only when SUDO configuration method was chosen.
# Note:For Single Instance database installations,the sudo user name must be the username of the user installing the database.
#--------------------------------------------------------------------------------------
oracle.install.db.rootconfig.sudoUserName=

###############################################################################
#                                                                             #
#                               Grid Options                                  #
#                                                                             #
###############################################################################

#------------------------------------------------------------------------------
# Value is required only if the specified install option is INSTALL_DB_SWONLY
# 
# Specify the cluster node names selected during the installation.
# 
# Example : oracle.install.db.CLUSTER_NODES=node1,node2
#------------------------------------------------------------------------------
oracle.install.db.CLUSTER_NODES=

###############################################################################
#                                                                             #
#                        Database Configuration Options                       #
#                                                                             #
###############################################################################

#-------------------------------------------------------------------------------
# Specify the type of database to create.
# It can be one of the following:
#   - GENERAL_PURPOSE                       
#   - DATA_WAREHOUSE 
# GENERAL_PURPOSE: A starter database designed for general purpose use or transaction-heavy applications.
# DATA_WAREHOUSE : A starter database optimized for data warehousing applications.
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.type=GENERAL_PURPOSE

#-------------------------------------------------------------------------------
# Specify the Starter Database Global Database Name. 
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.globalDBName=

#-------------------------------------------------------------------------------
# Specify the Starter Database SID.
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.SID=

#-------------------------------------------------------------------------------
# Specify whether the database should be configured as a Container database.
# The value can be either "true" or "false". If left blank it will be assumed
# to be "false".
#-------------------------------------------------------------------------------
oracle.install.db.ConfigureAsContainerDB=false

#-------------------------------------------------------------------------------
# Specify the  Pluggable Database name for the pluggable database in Container Database.
#-------------------------------------------------------------------------------
oracle.install.db.config.PDBName=

#-------------------------------------------------------------------------------
# Specify the Starter Database character set.
#                                               
#  One of the following
#  AL32UTF8, WE8ISO8859P15, WE8MSWIN1252, EE8ISO8859P2,
#  EE8MSWIN1250, NE8ISO8859P10, NEE8ISO8859P4, BLT8MSWIN1257,
#  BLT8ISO8859P13, CL8ISO8859P5, CL8MSWIN1251, AR8ISO8859P6,
#  AR8MSWIN1256, EL8ISO8859P7, EL8MSWIN1253, IW8ISO8859P8,
#  IW8MSWIN1255, JA16EUC, JA16EUCTILDE, JA16SJIS, JA16SJISTILDE,
#  KO16MSWIN949, ZHS16GBK, TH8TISASCII, ZHT32EUC, ZHT16MSWIN950,
#  ZHT16HKSCS, WE8ISO8859P9, TR8MSWIN1254, VN8MSWIN1258
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.characterSet=

#------------------------------------------------------------------------------
# This variable should be set to true if Automatic Memory Management 
# in Database is desired.
# If Automatic Memory Management is not desired, and memory allocation
# is to be done manually, then set it to false.
#------------------------------------------------------------------------------
oracle.install.db.config.starterdb.memoryOption=false

#-------------------------------------------------------------------------------
# Specify the total memory allocation for the database. Value(in MB) should be
# at least 256 MB, and should not exceed the total physical memory available 
# on the system.
# Example: oracle.install.db.config.starterdb.memoryLimit=512
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.memoryLimit=

#-------------------------------------------------------------------------------
# This variable controls whether to load Example Schemas onto
# the starter database or not.
# The value can be either "true" or "false". If left blank it will be assumed
# to be "false".
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.installExampleSchemas=false

###############################################################################
#                                                                             #
# Passwords can be supplied for the following four schemas in the       #
# starter database:            #
#   SYS                                                                       #
#   SYSTEM                                                                    #
#   DBSNMP (used by Enterprise Manager)                                       #
#                                                                             #
# Same password can be used for all accounts (not recommended)       #
# or different passwords for each account can be provided (recommended)       #
#                                                                             #
###############################################################################

#------------------------------------------------------------------------------
# This variable holds the password that is to be used for all schemas in the
# starter database.
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.password.ALL=

#-------------------------------------------------------------------------------
# Specify the SYS password for the starter database.
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.password.SYS=

#-------------------------------------------------------------------------------
# Specify the SYSTEM password for the starter database.
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.password.SYSTEM=

#-------------------------------------------------------------------------------
# Specify the DBSNMP password for the starter database.
# Applicable only when oracle.install.db.config.starterdb.managementOption=CLOUD_CONTROL
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.password.DBSNMP=

#-------------------------------------------------------------------------------
# Specify the PDBADMIN password required for creation of Pluggable Database in the Container Database.
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.password.PDBADMIN=

#-------------------------------------------------------------------------------
# Specify the management option to use for managing the database.
# Options are:
# 1. CLOUD_CONTROL - If you want to manage your database with Enterprise Manager Cloud Control along with Database Express.
# 2. DEFAULT   -If you want to manage your database using the default Database Express option.
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.managementOption=DEFAULT

#-------------------------------------------------------------------------------
# Specify the OMS host to connect to Cloud Control.
# Applicable only when oracle.install.db.config.starterdb.managementOption=CLOUD_CONTROL
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.omsHost=

#-------------------------------------------------------------------------------
# Specify the OMS port to connect to Cloud Control.
# Applicable only when oracle.install.db.config.starterdb.managementOption=CLOUD_CONTROL
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.omsPort=0

#-------------------------------------------------------------------------------
# Specify the EM Admin user name to use to connect to Cloud Control.
# Applicable only when oracle.install.db.config.starterdb.managementOption=CLOUD_CONTROL
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.emAdminUser=

#-------------------------------------------------------------------------------
# Specify the EM Admin password to use to connect to Cloud Control.
# Applicable only when oracle.install.db.config.starterdb.managementOption=CLOUD_CONTROL
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.emAdminPassword=

###############################################################################
#                                                                             #
# SPECIFY RECOVERY OPTIONS                                                #
# ------------------------------------                               #
# Recovery options for the database can be mentioned using the entries below  #
#                                                                             #
###############################################################################

#------------------------------------------------------------------------------
# This variable is to be set to false if database recovery is not required. Else 
# this can be set to true.
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.enableRecovery=false

#-------------------------------------------------------------------------------
# Specify the type of storage to use for the database.
# It can be one of the following:
#   - FILE_SYSTEM_STORAGE
#   - ASM_STORAGE
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.storageType=

#-------------------------------------------------------------------------------
# Specify the database file location which is a directory for datafiles, control
# files, redo logs.         
#
# Applicable only when oracle.install.db.config.starterdb.storage=FILE_SYSTEM_STORAGE 
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.fileSystemStorage.dataLocation=

#-------------------------------------------------------------------------------
# Specify the recovery location.
#
# Applicable only when oracle.install.db.config.starterdb.storage=FILE_SYSTEM_STORAGE 
#-------------------------------------------------------------------------------
oracle.install.db.config.starterdb.fileSystemStorage.recoveryLocation=

#-------------------------------------------------------------------------------
# Specify the existing ASM disk groups to be used for storage.
#
# Applicable only when oracle.install.db.config.starterdb.storageType=ASM_STORAGE
#-------------------------------------------------------------------------------
oracle.install.db.config.asm.diskGroup=

#-------------------------------------------------------------------------------
# Specify the password for ASMSNMP user of the ASM instance.                 
#
# Applicable only when oracle.install.db.config.starterdb.storage=ASM_STORAGE 
#-------------------------------------------------------------------------------

oracle.install.db.config.asm.ASMSNMPPassword=




###################################################################
###################################################################
###################################################################

[oracle@ip-172-31-22-126 db_home]$ ./runInstaller  -silent -responseFile /tmp/db_software_only.rsp                                         Launching Oracle Database Setup Wizard...

[WARNING] [INS-13014] Target environment does not meet some optional requirements.
   CAUSE: Some of the optional prerequisites are not met. See logs for details. /u01/app/oraInventory/logs/InstallActions2020-             04-04_08-02-01PM/installActions2020-04-04_08-02-01PM.log
   ACTION: Identify the list of failed prerequisite checks from the log: /u01/app/oraInventory/logs/InstallActions2020-04-04_0             8-02-01PM/installActions2020-04-04_08-02-01PM.log. Then either from the log file or from installation manual find the appropri             ate configuration to meet the prerequisites and fix it manually.
The response file for this session can be found at:
 /u01/app/oracle/product/19.0.0/db_home/install/response/db_2020-04-04_08-02-01PM.rsp

You can find the log of this install session at:
 /u01/app/oraInventory/logs/InstallActions2020-04-04_08-02-01PM/installActions2020-04-04_08-02-01PM.log

As a root user, execute the following script(s):
        1. /u01/app/oracle/product/19.0.0/db_home/root.sh

Execute /u01/app/oracle/product/19.0.0/db_home/root.sh on the following nodes:
[ip-172-31-22-126]


Successfully Setup Software with warning(s).
[oracle@ip-172-31-22-126 db_home]$
[oracle@ip-172-31-22-126 db_home]$
[oracle@ip-172-31-22-126 db_home]$


[root@ip-172-31-22-126 ~]#
[root@ip-172-31-22-126 ~]# /u01/app/oracle/product/19.0.0/db_home/root.sh
Check /u01/app/oracle/product/19.0.0/db_home/install/root_ip-172-31-22-126.ap-south-1.compute.internal_2020-04-04_20-04-21-935220315.log for the output of root script
[root@ip-172-31-22-126 ~]# more /u01/app/oracle/product/19.0.0/db_home/install/root_ip-172-31-22-126.ap-south-1.compute.internal_2020-04-04_20-04-21-935220315.log
Performing root user operation.

The following environment variables are set as:
    ORACLE_OWNER= oracle
    ORACLE_HOME=  /u01/app/oracle/product/19.0.0/db_home
   Copying dbhome to /usr/local/bin ...
   Copying oraenv to /usr/local/bin ...
   Copying coraenv to /usr/local/bin ...

Entries will be added to the /etc/oratab file as needed by
Database Configuration Assistant when a database is created
Finished running generic part of root script.
Now product-specific root actions will be performed.
Oracle Trace File Analyzer (TFA) is available at : /u01/app/oracle/product/19.0.0/db_home/bin/tfactl
[root@ip-172-31-22-126 ~]#
[root@ip-172-31-22-126 ~]#
[root@ip-172-31-22-126 ~]#


Reference:
---------------

How to Install 11.2 /12.1/12.2/18c/19c Database/Client Software in Silent Mode with/without Using Response File (Doc ID 885643.1)

How to Resize EBS Volumes on AWS

How to Resize EBS Volumes on AWS

Extend  EBS volume size after that increase mount point size at OS level

[ec2-user@ip-172-31-22-126 ~]$ sudo su -
Last login: Sat Apr  4 19:47:38 UTC 2020 on pts/1
[root@ip-172-31-22-126 ~]#
[root@ip-172-31-22-126 ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        1.9G     0  1.9G   0% /dev
tmpfs           2.0G  640M  1.4G  32% /dev/shm
tmpfs           1.9G   17M  1.9G   1% /run
tmpfs           1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/xvda2       30G   29G  1.3G  96% /
tmpfs           379M     0  379M   0% /run/user/1000
[root@ip-172-31-22-126 ~]#




[root@ip-172-31-22-126 ~]# sudo growpart /dev/xvda 2
CHANGED: partition=2 start=4096 old: size=62910430 end=62914526 new: size=167768030 end=167772126
[root@ip-172-31-22-126 ~]#
[root@ip-172-31-22-126 ~]# xfs_growfs -d /
meta-data=/dev/xvda2             isize=512    agcount=20, agsize=393216 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=7863803, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 7863803 to 20971003
[root@ip-172-31-22-126 ~]#
[root@ip-172-31-22-126 ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        1.9G     0  1.9G   0% /dev
tmpfs           2.0G  640M  1.4G  32% /dev/shm
tmpfs           1.9G   17M  1.9G   1% /run
tmpfs           1.9G     0  1.9G   0% /sys/fs/cgroup
/dev/xvda2       80G   29G   52G  36% /
tmpfs           379M     0  379M   0% /run/user/1000
[root@ip-172-31-22-126 ~]#

Manually set local_listener at database level for service registration

Set local_listener at the database level  for service registration 



Set local_listener at DB levels 
-------------------------------------------

alter system set local_listener='(ADDRESS = (PROTOCOL=TCP)(HOST=192.168.43.200)(PORT=1521))'  scope=both;

alter system register ;


SQL> show parameter local

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
local_listener                       string      (ADDRESS = (PROTOCOL=TCP)(HOST
                                                 =192.168.43.36)(PORT=1521))

SQL>

sample listener.ora
-------------------------

[oracle@proddb19c admin]$ cat listener.ora
# listener.ora Network Configuration File: /u01/app/oracle/product/19.0.0/db_home/network/admin/listener.ora
# Generated by Oracle configuration tools.

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.43.36)(PORT = 1521))
    )
  )

ADR_BASE_LISTENER = /u01/app/oracle

[oracle@proddb19c admin]$

sample tnsnames.ora

----------------------------

[oracle@proddb19c admin]$ cat tnsnames.ora

orcl =

  (DESCRIPTION =

    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.43.36)(PORT = 1521))

    (CONNECT_DATA =

      (SERVER = DEDICATED)

      (SERVICE_NAME = orcl)

      (UR = A)

   )

 )

[oracle@proddb19c admin]$

RPM required to enable X11 display

--------------------------------------------

yum install  xorg-x11-server-Xorg xorg-x11-xauth xorg-x11-apps -y

Oracle Database 19c step by step installation guide on Oracle Linux 7.5

Oracle Database 19c step by step installation guide on Oracle Linux 7.5

• Make sure all prerequisites met before installing oracle software, like kernel parameter , permission, RPM's, etc. Use this link for reference(https://anuragkumarjoy.blogspot.com/2016/02/oracle-database-installation-on-oracle.html)
• Download the oracle 19c software from oracle support
• unzip oracle software in ORACLE_HOME location 
• ORACLE_HOME=/u01/app/oracle/product/19.0.0/db_home
• go to ORACLE_HOME (cd /u01/app/oracle/product/19.0.0/db_home)
• unzip command: (unzip -oq /tmp/LINUX.X64_193000_db_home.zip)
• after that run the  "./runInstaller"

In this case, I used sample schema installed

This window is pop-up because I used a non-standard password.

after increased "shmmax" parameter, run -run the check again

Need to run from root user.