Now I've got a synced wallet on my Linux console.
Next step: I'd like to start mining.

Can anybody confirm me this is the right command in Linux?

./spiced setgenerate true

As far as I understood it might take a while for me to see a block.
If I query getmininginfo I read:

{
    "blocks" : 10828,
    "currentblocksize" : 1000,
    "currentblocktx" : 0,
    "difficulty" : 32.29897560,
    "errors" : "",
    "generate" : true,
    "genproclimit" : 1,
    "hashespersec" : 107285,
    "pooledtx" : 0,
    "testnet" : false
}


Thanks!