ulimit prerequisite?

Starting with new db and 12.1.0.5 runInstaller prereq check says:

Checking for required ulimit value...

Description:

This is a prerequisite condition to test whether the minimum required ulimit value is available on the system.

Check complete. The overall result of this check is: Failed <<<<

Recommendation:

1.Update the /etc/security/limits.conf file with the required values, relogin to the shell and perform the install.

2.Check if the ulimit binary exist in path,else it would return a null value for ulimit

Didn't have this problem yesterday...

> grep 4096 /etc/security/limits.conf

oracle soft nofile 4096

oracle hard nofile 4096

> ulimit -n

4096