How to pipe output to another command parameter?
 

Hi,

How do I render the output of one command to another.

Example, calling a webservice to login:
# wget localhost/login.php --post-string="userid=1&password=SECRET1"

But now I want to change 'SECRET1' to output from another program like...
# echo "SECRET2" | wget localhost/login.php --post-string="userid=1&password=SECRET1"

Where I am trying to now call the webservice form the 'echo' commands output which is 'SECRET2' and not 'SECRET1'.

Maybe:

wget localhost/login.php --post-string="userid=1&password=$(echo SECRET2)"

Works perfect, thanks!