Can we check number of instances running on Oracle server and how to set kernel parameters in Linux?
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- view the /etc/oratab file on a server gives the list of oracle instances running on your server.
- view /etc/sysctl.conf file with 'cat' command will open a text file listing out kernel level parameters.
- We can make changes to kernel parameters as required for our environment only as a root user.
- To make the changes affected permanently to kernel run the command /sbin/sysctl –p.
- We must also set file maximum descriptors during oracle installation which can be done by editing /etc/security/limits.conf as a root user.