How to execute a file via adb command line? I am trying to root my Motorola Xoom. Root checker pro currently tells me that "Executing this file can grant root access!" So I want to try that.

the file is located in system/bin and is called su.

I have gotten this far:

adb shell

cd system/bin

How do I execute the system/bin/su file via the adb command line?
A few suggestions (this is a shell so I'm guessing you have basic shell commands) one or all of these may work:

First try: sh su

Then: bash su

Then: ./su

If it has an extension give all the above commands a try with the extension of su

Also as a suggestion to see what commands are available just type: help

[EDIT]

since you mentioned not having root access try using the sudo command before su (and the above commands if needed)