Update cheatsheets

tldr/bitcoind

@@ -0,0 +1,26 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# bitcoind
+
+> Bitcoin Core daemon.
+> Uses the configuration defined in `bitcoin.conf`.
+> More information: <https://manned.org/bitcoind>.
+
+- Start the Bitcoin Core daemon (in the foreground):
+
+`bitcoind`
+
+- Start the Bitcoin Core daemon in the background (use `bitcoin-cli stop` to stop):
+
+`bitcoind -daemon`
+
+- Start the Bitcoin Core daemon on a specific network:
+
+`bitcoind -chain={{main|test|signet|regtest}}`
+
+- Start the Bitcoin Core daemon using specific config file and data directory:
+
+`bitcoind -conf={{path/to/bitcoin.conf}} -datadir={{path/to/directory}}`