Checking swap space: 0 MB available, 150 MB required. Failed

Checking swap space: 0 MB available, 150 MB required.    Failed 

[oracle@oracle12c database]$ ./runInstaller

Starting Oracle Universal Installer...

Checking Temp space: must be greater than 500 MB.   Actual 1991 MB    Passed

Checking swap space: 0 MB available, 150 MB required.    Failed 

Checking monitor: must be configured to display at least 256 colors.    Actual 16777216    Passed

Some requirement checks failed. You must fulfill these requirements before

continuing with the installation,

User Selected: No

Solution :

Need to add swap space 

https://anuragkumarjoy.blogspot.com/2020/04/adding-swap-space-in-linux.html

[root@oracle12c ~]# free -g

              total        used        free      shared  buff/cache   available

Mem:              7           0           2           0           4           6

Swap:             1           0           1

[root@oracle12c ~]#

How to check the valid components loaded into the database (JVM,XML,XDK,Oracle Label Security......) ?

How to check the valid components loaded into the database ?

Login as privilege user and run below commands : 

SQL> select * from all_registry_banners;

BANNER                                                                           BANNER_FULL

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

Oracle Database Catalog Views Release 19.0.0.0.0 - Production                    Oracle Database Catalog Views Release 19.0.0.0.0 - Production Version 19.3.0.0.0

Oracle Database Packages and Types Release 19.0.0.0.0 - Production               Oracle Database Packages and Types Release 19.0.0.0.0 - Production Version 19.3.0.0.0

Oracle XML Database Release 19.0.0.0.0 - Production                              Oracle XML Database Release 19.0.0.0.0 - Production Version 19.3.0.0.0

Oracle Workspace Manager Release 19.0.0.0.0 - Production                         Oracle Workspace Manager Release 19.0.0.0.0 - Production Version 19.3.0.0.0

JServer JAVA Virtual Machine Release 19.0.0.0.0 - Production                     JServer JAVA Virtual Machine Release 19.0.0.0.0 - Production Version 19.3.0.0.0

Oracle XDK Release 19.0.0.0.0 - Production                                       Oracle XDK Release 19.0.0.0.0 - Production Version 19.3.0.0.0

Oracle Database Java Packages Release 19.0.0.0.0 - Production                    Oracle Database Java Packages Release 19.0.0.0.0 - Production Version 19.3.0.0.0

Oracle Text Release 19.0.0.0.0 - Production                                      Oracle Text Release 19.0.0.0.0 - Production Version 19.3.0.0.0

Oracle Multimedia Release 19.0.0.0.0 - Production                                Oracle Multimedia Release 19.0.0.0.0 - Production Version 19.3.0.0.0

OLAP Analytic Workspace Release 19.0.0.0.0 - Production                          OLAP Analytic Workspace Release 19.0.0.0.0 - Production Version 19.3.0.0.0

Oracle OLAP API Release 19.0.0.0.0 - Production                                  Oracle OLAP API Release 19.0.0.0.0 - Production Version 19.3.0.0.0

Spatial Release 19.0.0.0.0 - Production                                          Spatial Release 19.0.0.0.0 - Production Version 19.3.0.0.0

Oracle Label Security Release 19.0.0.0.0 - Production                            Oracle Label Security Release 19.0.0.0.0 - Production Version 19.3.0.0.0

Oracle Database Vault Release 19.0.0.0.0 - Production                            Oracle Database Vault Release 19.0.0.0.0 - Production Version 19.3.0.0.0

14 rows selected.

SQL>

Login using SSH into a new EC2 instance created from an custom AMI (image)

 Not able to login (SSH) to EC2 running Linux(Custom AMI)

Solution 

Login as ec2-user 

sudo su - root 

first use source *.pem key to login ec2 instance launch from custom AMI using ec2-user 

enable PasswordAuthentication to yes

vi /etc/ssh/sshd_config

PasswordAuthentication yes

systemctl restart sshd

then login with root user with same password as source.