bitcoin-qt(1) peer-to-peer network based digital currency



bitcoin-qt [command-line options]


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Specify configuration file (default: bitcoin.conf)
Specify pid file (default:
Generate coins
Don't generate coins
Specify data directory
Set database cache size in megabytes (default: 25)
Specify connection timeout in milliseconds (default: 5000)
Connect through SOCKS5 proxy
Use proxy to reach tor hidden services (default: same as -proxy)
Allow DNS lookups for -addnode, -seednode and -connect
Listen for connections on <port> (default: 8333 or testnet: 18333)
Maintain at most <n> connections to peers (default: 125)
Add a node to connect to and attempt to keep the connection open
Connect only to the specified node(s)
Connect to a node to retrieve peer addresses, and disconnect
Specify your own public address
Only connect to nodes in network <net> (IPv4, IPv6 or Tor)
Discover own IP address (default: 1 when listening and no -externalip)
Only accept block chain matching built-in checkpoints (default: 1)
Accept connections from outside (default: 1 if no -proxy or -connect)
Bind to given address and always listen on it. Use [host]:port notation for IPv6
Find peers using DNS lookup (default: 1 unless -connect)
Threshold for disconnecting misbehaving peers (default: 100)
Number of seconds to keep misbehaving peers from reconnecting (default: 86400)
Maximum per-connection receive buffer, <n>*1000 bytes (default: 5000)
Maximum per-connection send buffer, <n>*1000 bytes (default: 1000)
Use UPnP to map the listening port (default: 1 when listening)
Fee per KB to add to transactions you send
Accept command line and JSON-RPC commands
Use the test network
Output extra debugging information. Implies all other -debug* options
Output extra network debugging information
Prepend debug output with timestamp
Shrink debug.log file on client startup (default: 1 when no -debug)
Send trace/debug info to console instead of debug.log file
Username for JSON-RPC connections
Password for JSON-RPC connections
Listen for JSON-RPC connections on <port> (default: 8332 or testnet: 18332)
Allow JSON-RPC connections from specified IP address
Set the number of threads to service RPC calls (default: 4)
Execute command when the best block changes (%s in cmd is replaced by block hash)
Execute command when a wallet transaction changes (%s in cmd is replaced by TxID)
Execute command when a relevant alert is received (%s in cmd is replaced by message)
Upgrade wallet to latest format
Set key pool size to <n> (default: 100)
Rescan the block chain for missing wallet transactions
Attempt to recover private keys from a corrupt wallet.dat
How many blocks to check at startup (default: 288, 0 = all)
How thorough the block verification is (0-4, default: 3)
Maintain a full transaction index (default: 0)
Imports blocks from external blk000??.dat file
Rebuild block chain index from current blk000??.dat files
Set the number of script verification threads (1-16, 0=auto, default: 0)

Block creation options:

Set minimum block size in bytes (default: 0)
Set maximum block size in bytes (default: 250000)
-blockprioritysize=<n> Set maximum size of high-priority/low-fee transactions in bytes (default: 27000)

SSL options: (see the Bitcoin Wiki for SSL setup instructions)
Use OpenSSL (https) for JSON-RPC connections
Server certificate file (default: server.cert)
Server private key (default: server.pem)
Acceptable ciphers (default: TLSv1+HIGH:!SSLv2:!aNULL:!eNULL:!AH:!3DES:@STRENGTH)

UI options:

Set language, for example "de_DE" (default: system locale)
Start minimized
Show splash screen on startup (default: 1)