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 ~]#