App availability can be a problem on Linux. There are some open source accounting apps which you could look at to see if they meet your needs. Regarding migrating Access apps, you could take a look at Versora, which does some migration software and might address Access.
A different sort of solution is Wine (open source) or CodeWeaver's CrossOver (commercial) software, which enables Microsoft applications to run on Linux. I've used it and it does a good job. Good luck.
This was first published in September 2006