How can I use Bitcoind on Ubuntu if I installed from PPA? I have two transactions that won't go through. The first one I  I sent with a zero transaction fee by accident and the second one I  I sent with a fee of .00022324. Neither is going through. I read this question and one of the answers said that


  What can I do to speed-up the transaction’s confirmation?
  
  Nothing. The next best thing is to cancel and resend the transaction.
  
  Make a note of the individual bitcoin address(es) that the unconfirmed transaction was sent from.
      Wait a few days until your wallet stops broadcasting the transaction (or for immediate results, run Bitcoin Core with the -zapwallettxes option)
      Send all your bitcoins from the addresses recorded in step 1 to a new address with the recommended or higher than recommended fee.
      Make original transaction again using the recommended fee.


I wanted to try the -zapwallettxes option but when I try to run bitcoind from terminal it doesn't work. And since I installed from PPA I can't find where the binary was put.
You probably installed bitcoin-qt only.
You should install it first.

sudo apt-get install bitcoind