Add an iRule to multiple virtual servers

Try this Bash script:

!/bin/bash

for virtual in `tmsh list /ltm virtual one-line |awk -F" " '{ print $3 }' |grep www`; do
    tmsh modify /ltm virtual $virtual rules { test-rule }
done

If you do:

grep ^www

That'll grab virtual servers that start with www, and if you leave the grep off completely it'll give you all of the virtual servers.