I assume you are getting li-200.members.linode.com as your domain name (and not some other, completely incorrect name) instead of garzsbarg.com, in which case you need to turn off DHCP to activate the settings in your /etc/hostname and /etc/dnsdomainname files.
For Gentoo you need to edit /etc/conf.d/net as follows:
1) comment out the line
Code:
iface_eth0="dhcp"
2) add a line to statically configure the ethernet interface:
Code:
iface_eth0="xx.xx.xx.xx netmask 255.255.255.0"
where xx.xx.xx.xx is your Linode's IP address (64.5.53.200)
3) add a line to set the default gateway
Code:
gateway="eth0/yy.yy.yy.yy"
where yy.yy.yy.yy is the gateway specified on the network information page linked from your Linode members page.