DESCRIPTION

Usage:

bitcoin-qt [command-line options]

OPTIONS

-?

This help message

-conf=<file>

Specify configuration file (default: bitcoin.conf)

-pid=<file>

Specify pid file (default: bitcoind.pid)

-gen

Generate coins

-gen=0

Don't generate coins

-datadir=<dir>

Specify data directory

-dbcache=<n>

Set database cache size in megabytes (default: 25)

-timeout=<n>

Specify connection timeout in milliseconds (default: 5000)

-proxy=<ip:port>

Connect through SOCKS5 proxy

-tor=<ip:port>

Use proxy to reach tor hidden services (default: same as -proxy)

-dns

Allow DNS lookups for -addnode, -seednode and -connect

-port=<port>

Listen for connections on <port> (default: 8333 or testnet: 18333)

-maxconnections=<n>

Maintain at most <n> connections to peers (default: 125)

-addnode=<ip>

Add a node to connect to and attempt to keep the connection open

-connect=<ip>

Connect only to the specified node(s)

-seednode=<ip>

Connect to a node to retrieve peer addresses, and disconnect

-externalip=<ip>

Specify your own public address

-onlynet=<net>

Only connect to nodes in network <net> (IPv4, IPv6 or Tor)

-discover

Discover own IP address (default: 1 when listening and no -externalip)

-checkpoints

Only accept block chain matching built-in checkpoints (default: 1)

-listen

Accept connections from outside (default: 1 if no -proxy or -connect)

-bind=<addr>

Bind to given address and always listen on it. Use [host]:port notation for IPv6

-dnsseed

Find peers using DNS lookup (default: 1 unless -connect)

-banscore=<n>

Threshold for disconnecting misbehaving peers (default: 100)

-bantime=<n>

Number of seconds to keep misbehaving peers from reconnecting (default: 86400)

-maxreceivebuffer=<n>

Maximum per-connection receive buffer, <n>*1000 bytes (default: 5000)

-maxsendbuffer=<n>

Maximum per-connection send buffer, <n>*1000 bytes (default: 1000)

-upnp

Use UPnP to map the listening port (default: 1 when listening)

-paytxfee=<amt>

Fee per KB to add to transactions you send

-server

Accept command line and JSON-RPC commands

-testnet

Use the test network

-debug

Output extra debugging information. Implies all other -debug* options

-debugnet

Output extra network debugging information

-logtimestamps

Prepend debug output with timestamp

-shrinkdebugfile

Shrink debug.log file on client startup (default: 1 when no -debug)

-printtoconsole

Send trace/debug info to console instead of debug.log file

-rpcuser=<user>

Username for JSON-RPC connections

-rpcpassword=<pw>

Password for JSON-RPC connections

-rpcport=<port>

Listen for JSON-RPC connections on <port> (default: 8332 or testnet: 18332)

-rpcallowip=<ip>

Allow JSON-RPC connections from specified IP address

-rpcthreads=<n>

Set the number of threads to service RPC calls (default: 4)

-blocknotify=<cmd>

Execute command when the best block changes (%s in cmd is replaced by block hash)

-walletnotify=<cmd>

Execute command when a wallet transaction changes (%s in cmd is replaced by TxID)

-alertnotify=<cmd>

Execute command when a relevant alert is received (%s in cmd is replaced by message)

-upgradewallet

Upgrade wallet to latest format

-keypool=<n>

Set key pool size to <n> (default: 100)

-rescan

Rescan the block chain for missing wallet transactions

-salvagewallet

Attempt to recover private keys from a corrupt wallet.dat

-checkblocks=<n>

How many blocks to check at startup (default: 288, 0 = all)

-checklevel=<n>

How thorough the block verification is (0-4, default: 3)

-txindex

Maintain a full transaction index (default: 0)

-loadblock=<file>

Imports blocks from external blk000??.dat file

-reindex

Rebuild block chain index from current blk000??.dat files

-par=<n>

Set the number of script verification threads (1-16, 0=auto, default: 0)

Block creation options:

-blockminsize=<n>

Set minimum block size in bytes (default: 0)

-blockmaxsize=<n>

Set maximum block size in bytes (default: 250000)

-blockprioritysize=<n> Set maximum size of high-priority/low-fee transactions in bytes (default: 27000)

UI options:

-lang=<lang>

Set language, for example "de_DE" (default: system locale)

-min

Start minimized

-splash

Show splash screen on startup (default: 1)