Processes and available space?

fairly simple,
How can i view current available disk space?

How can i see current processes and available memory?

im curious as to how much memory im using on this old laptop and how much each program is using and im pretty limited on disk space... ive tried a google search but cannot come up with anything useful!
:???:

The following will come in handy:
df --> shows disk space information for all mounted devices
free --> shows info about memory and swap
top --> shows system processes

For more info, refer to the manual pages for the individual commands.

Thanks for the quick reply!
is there a way to list all commands or a website that has them available?

Try this:
http://www.perpetualpc.net/srtd_commands_rev.html