redis dump.rdb / saving small files

Context

• I'm using redis. The database is < 100 MB.
• However, I want to make daily backups.
• I'm also running on Ubuntu Server 12.04

When type in:

redis-cli save

I don't know where dump.rdb is saved to (since redis is started as a service and not in my local directory).

Questions:

1. How do I find where redis is saving my dump.rdb to?

2. Is there someway that I can specify a filename to 'save', so I type in something like:

   redis-cli save ~/db-2012-06-24.rdb

Thanks