How do I temporarily change a kernel parameter/tunable on redhat?

[africaele]

Refer to the readme important notes first. README.

Also see:
sysctl(8) - configure kernel parameters at runtime
sysctl.conf(5) - sysctl preload/configuration file
sysctl.d - Configure kernel parameters at boot

Check the current value of the kernel parameter you want to change.

$ sudo sysctl -a | grep net.ipv6.conf.eth0.disable_ipv6
net.ipv6.conf.eth0.disable_ipv6 = 0

Make the temporary change.

$ sudo sysctl net.ipv6.conf.eth0.disable_ipv6=1
net.ipv6.conf.eth0.disable_ipv6 = 1