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Try specifying the broadcast address as well.
ifconfig eth0 inet 192.168.1.38 netmask 255.255.255.0 broadcast 255192.255168.2551.0255
Also a host name lookup failure could be DNS related as well so check your DNS settings are correct.
ifconfig eth0 inet 192.168.1.38 netmask 255.255.255.0 broadcast 255.255.255.0
ifconfig eth0 inet 192.168.1.38 netmask 255.255.255.0 broadcast 192.168.1.255
