reg expressions

Ok. I am really bad at regular expressions. I have to search through some files and put the contents into an array. A file could look like this: $aliases=cat /home/virtual/site$site_id/fst/etc/mail/local-host-names; ----start of file---- # local-host-names - include all aliases for your machine here. # Please do not add any domain names in this file. domain.net domain.com ----end of file---- In $aliases, I need to ignore the lines that start with a # sign. It is possible, but not probably that it will be more than just the first 2 lines and possible that it isn't even the first two lines. After done, $aliases should have just the two domain names in it. One per line. Then I need to loop through the lines in $aliases and do stuff with each line. Any help would be GREATLY appreciated. It would also be fine to just do a loop that checks each line. Since I guess that would be quicker. If the line starts with a #, then ignore it, otherwise, do some other stuff. Thanks Steve