Why root users can't switch to oracle users

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Solution:

Vi / etc/security/limits.conf

Will * soft nofile 1024

* hard nofile 8192

Modify to

* soft nofile 2048

* hard nofile 8192

After the modification, use ulimit-Hn and ulimit-Sn to confirm that the modification has taken effect.

I tried again.

Su-oracle

Success

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