How to find out which tinycore version i am using?

[emninger]

I know the command uname -a to know the kernel version (3.16.6 in my case).

But how do i find out which tinycore version?

Btw, is there in some way an upgrade path?

[gerald_clark]

The command is 'version'.
To upgrade minor version,  just copy the new core.gz over the old one.
You should also check for updates in Apps.