Running another instance of bitcoin-qt dedicated to testnet/regtest?

[Geremia]

Is it possible to run another instance of `bitcoin-qt` dedicated to testnet/regtest? If so, how do i do this?

My question is similar to the "Running two bitcoind instances for different nets" question and "How to run testnet and bitcoind on same server" thread here, but I want to associate `bitcoin-qt`, not just `bitcoind`, with the testnet/regtest.

(cf. the related StackExchange question)

[person]

It should work the same way, just configuring two bitcoin-qt clients to use different configurations.

See this: https://bitcointalk.org/index.php?topic=249476.msg2649295#msg2649295

[BitBlitz]

And in one of the configs, add testnet=1 in the bitcoin.conf file.

[achow101]

Just start your testnet instance with the "-testnet" flag and it will create another instance of Bitcoin-qt on the testnet network.

[Geremia]

Just start your testnet instance with the "-testnet" flag and it will create another instance of Bitcoin-qt on the testnet network.

Oh, I didn't know it was that easy! thank you!

I also discovered the "datadir" flag, which was just what I was looking for, although it seems testnet/regtest make their directories. At least regtest does, according to the Bitcoin Developer Examples documentation:

Regtest wallets and block chain state (chainstate) are saved in the regtest subdirectory of the Bitcoin Core configuration directory.

[Geremia]

I just ran "bitcoin-qt -regtest," and it launched with a green icon, distinguishing it from my already-running red one! Nice!