DNSSEC with named

Faster entropy

after haveged is installed /proc/sys/kernel/random/entropy_avail should return something above 1000.

yum install -y epel-release
yum install -y rng-tools haveged
systemctl enable haveged.service
systemctl start haveged.service
systemctl status haveged.service
cat /proc/sys/kernel/random/entropy_avail
cat /dev/random | rngtest -c 1000

Source: NixCraft

Linux Network

Linux DHCP renew

howto renew your DHCP lease without restarting your network interface. First release your current lease and then request a new for interface eth0.

[code language=”bash”]
dhclient -r eth0
dhclient eth0