The sysctl command is used to modify kernel parameters at runtime in Linux. To reload the variables defined in the sysctl.conf file, you need to run the following command:
sudo sysctl -p
This will reload the kernel parameters from the /etc/sysctl.conf file and apply any changes to the current running system. If the sysctl.conf file has been modified, running this command will make the changes take effect without rebooting the system.
Note that you may need to run the command with sudo to have the necessary permissions to reload the kernel parameters.