Root user cannot switch to Oracle user

Today found that the company Linux server under the root user can not switch to Oracle users through Su-oracle, so Baidu. The result is that the number of open files is too large, considering that the kill process is too risky, decide to modify the changes/etc/security/limits.conf

Vi/etc/security/limits.conf

Will * Soft nofile 1024

* Hard Nofile 8192

Revision changed to

* Soft Nofile 2048

* Hard Nofile 8192

Once modified, use ULIMIT-HN and ULIMIT-SN to confirm that the changes are in effect.

Try again.

Su-oracle

Success

Reference post: http://blog.csdn.net/lively1982/article/details/9982007

Root user cannot switch to Oracle user