copy command

hi all

how do you use the copy command
call me dumb, i have RTFM but i don't seem to get it.

an exstract from my dns.txt file.

aeomc04         10.121.4.157
somcmd1         10.121.23.57
aeomc05         10.121.4.162
gsmomc6         10.121.4.154


wire_dev=> copy dns_ip from dns.txt
wire_dev-> ;
ERROR:  parser: parse error at or near "dns"
wire_dev=> copy dns_ip from /database/pgsql/dns.txt
wire_dev-> ;
ERROR:  parser: parse error at or near "/"
wire_dev=>
wire_dev=> \d dns_ip               Table "dns_ip"Attribute |         Type          | Modifier
-----------+-----------------------+----------dns       | character varying(32) |ip        | character varying(32) |

thanx