fogey:~\$ for f in com net org; do echo Suffix: $f; host perlmonks.$f; host www.perlmonks.$f; done Suffix: com perlmonks.com has address 66.39.54.2 perlmonks.com has address 209.197.123.153 perlmonks.com mail is handled (pri=0) by mail.egl.net www.perlmonks.com is a nickname for perlmonks.com perlmonks.com has address 209.197.123.153 perlmonks.com has address 66.39.54.2 perlmonks.com mail is handled (pri=0) by mail.egl.net Suffix: net www.perlmonks.net is a nickname for perlmonks.com perlmonks.com has address 66.39.54.2 perlmonks.com has address 209.197.123.153 perlmonks.com mail is handled (pri=0) by mail.egl.net Suffix: org perlmonks.org has address 66.39.54.27 perlmonks.org has address 209.197.123.153 perlmonks.org mail is handled (pri=10) by mail.egl.net www.perlmonks.org is a nickname for perlmonks.org perlmonks.org has address 209.197.123.153 perlmonks.org has address 66.39.54.27 perlmonks.org mail is handled (pri=10) by mail.egl.net