ref the "network" page at
https://www.linode.com/members/netinfo.cfm
The web page lists 65.19.178.1 as the default gateway, but the DHCP config set it as 66.160.141.1
The web page also says that resolv.conf should be set to
nameserver 216.156.129.66
nameserver 12.96.160.115
nameserver 216.234.234.30
but DHCP set it to
nameserver 65.19.175.2
nameserver 65.19.176.2
nameserver 65.19.174.2
nameserver 216.156.129.66
I've switched my linode to static addressing (for my own hostname and search path in resolv.conf) and so am assuming that the web page is just out of date and the static values I should program in are those that DHCP would normally give me.