How to modify Kernel parameters using the sysctl

You will see all the possible parameters using

# sysctl -a

For Example :

# sysctl -a kernel.panic = 0 kernel.core_uses_pid = 0 kernel.core_pattern = core kernel.tainted = 129

To list all variables that start with "vm."

# sysctl vm

To modify the kernel parameters, use following syntax:

sysctl -w variable=value

For Example:

# sysctl -w kernel.core_pattern=/var/opt/cores/core.%e.%p

Check what value is set the core pattern

# sysctl kernel.core_pattern
kernel.core_pattern = /var/opt/cores/core.%e.%p