using for command to resolve list of hostname to ip

[gimmegimmenothin]

Hi,

I have been looking around for a good tutorial when using "for"

i would like to use it to use a list of hostname "hosts.txt" and have it go through the list, using "host <server.my.com> and then output the data to a file.

any hints on how to correctly get this working for me is appreciated.

i was hoping to use:

for variable in hosts.txt
do
host
done

how doe the variable get defined though? and is this the proper way? : )

thanks!

my hosts.txt file is basically:

server1.my.com
server2.my.com
etc...

[Irithori]

for NODE in $(cat hosts.txt); do host ${NODE};done

[Irithori]

If hosts.txt contains a large amount of hosts, then you might want to replace the for loop with parallel: Build and execute shell command lines from standard input in parallel