Linux kernel tuning with sysctl

This command allows you to turn on or off numerous kernel parameters on the fly or you can edit a specific file to tune those same parameters. Either way you can modify all of the parameters listed in /proc/sys, so if you would like to see just how much you can modify, take a look at each of the subdirectories under the /proc/sys directory. For example, you can change the number of the maximum file descriptors on your machine by tuning the kern.maxfiles parameter.