Easily run cap shell on a list of servers:
cat list_of_servers | ./bin/setup_cap_shell <prefix> <postfix>
cap shell
Example:
smt:cap_shell(master) smtlaissezfaire$ cat tmp.txt
server1.example.com
server2.example.com
smt:cap_shell(master) smtlaissezfaire$ cat tmp.txt | ./bin/setup_cap_shell deploy@ :919
Using servers...
deploy@server1.example.com:919
deploy@server2.example.com:919
smt:cap_shell(master) smtlaissezfaire$ cap shell
* executing `shell'
====================================================================
Welcome to the interactive Capistrano shell! This is an experimental
feature, and is liable to change in future releases. Type 'help' for
a summary of how to use the shell.
--------------------------------------------------------------------
cap> pwd
[establishing connection(s) to deploy@server1.example.com:919, deploy@server2.example.com:919]
...