osx - Bash script: How to remote to a computer run a command and have output pipe to another computer? -

i need create bash script able ssh computer or machine b, run command , have output piped .txt file on machine how go doing this? list of computers ssh , run command of output append same .txt file on machine a.

update: ok went , followed other guy suggested , seems work:

file=/library/logs/file.txt ssh -n username@<ip> "$(< testscript.sh)" > $file  

what need instead of manually entering ip address, need have read list of hostnames coming .txt file , have place in variable substitute ip address. example be: ssh username@variable in "variable" changing each time word read file containing hostnames. ideas how go this?

this should it

ssh userb@machineb "some command" | ssh usera@machinea "cat - >> file.txt" 

with commands:

ssh userb@machineb <<'end' | ssh usera@machinea "cat - >> file.txt" echo hostname=$(hostname) lastchecked=$(date) ls -l /applications/utilities/disk\ utility.app/contents/plugins/*partition.dumodule* | awk '{printf "username=%s datemodified=%s %s %s\n", $3, $6, $7, $8}' end 

you replace ls -l | awk pipeline single stat call, appears osx stat not have way return user name, user id