Questions[remote-access](server)

Is it possible to use psexec to execute a command on a remote machine without having admin privileges on the remote machine?

I tried running psexec \\<machine> -u <username> -p <password>, where <username> and <password> are non-admin credentials, but I get an "access denied" error

I can remote desktop into the remote machine with the same credentials without any problems.

My local machine is running Windows 7 Enterprise 64-bit, and the remote machine is running Windows Server 2008 64-bit. I do have admin privileges on the local machine.

EDIT: To all the people who are downvoting this question: I am not trying to circumvent any sort of security measure. I can already run the process on the remote machine by remote desktop-ing into the remote machine and running it. I'm simply looking for a command-line way to do something I can already do through a GUI.

I'm trying to set up password-less login with ssh on Ubuntu Server, but I keep getting:

Agent admitted failure to sign using the key

and prompt for password.

I have generated new rsa keys. Before the system reboot it worked just fine.

All the links lead me to this bug, but nothing works. SSH Agent is still not running.

How to fix that? Maybe the files need specific permissions?

I'm writing a monitoring service that uses WMI to get information from remote machines. Having local admin rights on all these machines is not possible for political reasons.

Is this possible? What permissions/rights does my user require for this?

I have about a dozen Linux boxes that I occasionally need to run the same command(s) on. Is there an easier way (or automated way) to do this asides from logging on to each machine and running the command, one at a time? It's not the same commands all the time and it's not at a preset time so it's not something ideal for tools like cron.

What are the most commonly used remote support / screen sharing tools available?

How do they compare, both price- as functionality wise?