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sysctl
Display disk drives
sysctl hw.disknames
Linux
Changes to sysctl go in /etc/sysctl.conf.
Once your changes are made, you can reload from all the system files:
sysctl --system
To display all sysctl settings:
sysctl -a
You can set a value directly as well:
sysctl -w net.ipv4.ip_forward=1
Swappiness
In Linux, set the percentage to 10 in /etc/sysctl.conf:
vm.swappiness = 10
See also the Wikipedia article for a reference.
