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Command Line Options
Command line client options are a moving target under constant change now. Please refer to the client to geth help. Below is the output of geth help (version 0.9.19 10/5/2015).
geth [global options] command [command options] [arguments...]
VERSION:
0.9.19
COMMANDS:
blocktest loads a block test file
makedag generate ethash dag (for testing)
version print ethereum version numbers
wallet ethereum presale wallet
account manage accounts
dump dump a specific block from storage
console Geth Console: interactive JavaScript environment
js executes the given JavaScript files in the Geth JavaScript VM
import import a blockchain file
export export blockchain into file
upgradedb upgrade chainblock database
help Shows a list of commands or help for one command
GLOBAL OPTIONS:
--identity Custom node name
--unlock Unlock the account given until this program exits (prompts for password). '--unlock primary' unlocks the primary account
--password Path to password file to use with options and subcommands needing a password
--bootnodes Space-separated enode URLs for p2p discovery bootstrap
--datadir "$HOME/Library/Ethereum" Data directory to be used
--blockchainversion "2" Blockchain version (integer)
--jspath "." JS library path to be used with console and js subcommands
--port "30303" Network listening port
--maxpeers "25" Maximum number of network peers (network disabled if set to 0)
--maxpendpeers "0" Maximum number of pending connection attempts (defaults used if set to 0)
--etherbase "primary" Public address for block mining rewards. By default the address of your primary account is used
--gasprice "10000000000000" Sets the minimal gasprice when mining transactions
--minerthreads "8" Number of miner threads
--mine Enable mining
--nat "any" NAT port mapping mechanism (any|none|upnp|pmp|extip:<IP>)
--natspec Enable NatSpec confirmation notice
--nodekey P2P node key file
--nodekeyhex P2P node key as hex (for testing)
--rpc Enable the JSON-RPC server
--rpcaddr "127.0.0.1" Listening address for the JSON-RPC server
--rpcport "8545" Port on which the JSON-RPC server should listen
--rpccorsdomain Domain on which to send Access-Control-Allow-Origin header
--shh Enable whisper
--vmdebug Virtual Machine debug output
--protocolversion "60" ETH protocol version (integer)
--networkid "0" Network Id (integer)
--verbosity "3" Logging verbosity: 0-6 (0=silent, 1=error, 2=warn, 3=info, 4=core, 5=debug, 6=debug detail)
--backtrace_at ":0" If set to a file and line number (e.g., "block.go:271") holding a logging statement, a stack trace will be logged
--logtostderr Logs are written to standard error instead of to files.
--vmodule "" The syntax of the argument is a comma-separated list of pattern=N, where pattern is a literal file name (minus the ".go" suffix) or "glob" pattern and N is a log verbosity level.
--logfile Send log output to a file
--logjson Send json structured log output to a file or '-' for standard output (default: no json output)
--pprof Enable the profiling server on localhost
--pprofport "6060" Port on which the profiler should listen
--solc "solc" solidity compiler to be used
--help, -h show help
Note that the default for datadir is platform-specific. See backup & restore for more information.
Import ether presale wallet into your node (prompts for password):
geth wallet import /path/to/my/etherwallet.json
Import an EC privatekey into an ethereum account (prompts for password):
geth account import /path/to/key.prv
Bring up the geth javascript console:
geth --verbosity 5 --logtostderr --jspath /mydapp/js console 2>> /path/to/logfile
Execute test.js javascript using js API and log Debug-level messages to /path/to/logfile:
geth --logtostderr --verbosity 6 js test.js 2>> /path/to/logfile
Import a blockchain from file:
geth import blockchain.bin
When the consensus algorithm is changed blocks in the blockchain must be reimported with the new algorithm. Geth will inform the user with instructions when and how to do this when it's necessary.
geth upgradedb
Start two mining nodes using different data directories listening on ports 30303 and 30304, respectively:
geth --mine --minerthreads 4 --datadir /usr/local/share/ethereum/30303 --port 30303
geth --mine --minerthreads 4 --datadir /usr/local/share/ethereum/30304 --port 30304
Start an rpc client on port 8000:
geth --rpc true --rpcport 8000 --rpccorsdomain '"*"'
Start a client with a private network id and connect to specific peers using enode urls:
geth --networkid 3301 -bootnodes="enode://6f8a80d14311c39f35f516fa664deaaaa13e85b2f7493f37f6144d86991ec012937307647bd3b9a82abe2974e1407241d54947bbb39763a4cac9f77166ad92a0@54.169.166.226:30303 enode://0b2fa1e93dfcd90ce503ab1338332d6a1371b464838b49f37af8534a510992bd4d96b24134ba262ad9298ab4aa6f132132f84c3b6d10ebaead5f9a236be286f10@54.169.166.218:30305" -maxpeers 2
Launch the client without network:
geth --maxpeers 0 js justwannarunthis.js
In the datadir, delete the blockchain directory. For an example above:
rm -rf /usr/local/share/ethereum/30303/blockchain
The lines below are meant only for test network and safe environments for non-interactive scripted use.
geth --datadir /tmp/eth/42 --password <(echo -n notsosecret) account new 2>> /tmp/eth/42.log
geth --datadir /tmp/eth/42 --port 30342 js <(echo 'console.log(admin.nodeInfo().NodeUrl)') > enode 2>> /tmp/eth/42.log
geth --datadir /tmp/eth/42 --port 30342 --password <(echo -n notsosecret) --unlock primary --minerthreads 4 --mine 2>> /tmp/eth/42.log
The output of mist help. Please refer to the client for uptodate info.
mist [global options] command [command options] [arguments...]
VERSION:
0.9.19
COMMANDS:
help Shows a list of commands or help for one command
GLOBAL OPTIONS:
--asset_path "$GOPATH/src/github.com/ethereum/go-ethereum/cmd/mist/assets" absolute path to GUI assets directory
--rpccorsdomain "http://localhost" Domain on which to send Access-Control-Allow-Origin header
--bootnodes Space-separated enode URLs for p2p discovery bootstrap
--datadir "$HOME/Library/Ethereum" Data directory to be used
--port "30303" Network listening port
--logfile Send log output to a file
--verbosity "3" Logging verbosity: 0-6 (0=silent, 1=error, 2=warn, 3=info, 4=core, 5=debug, 6=debug detail)
--maxpeers "25" Maximum number of network peers (network disabled if set to 0)
--maxpendpeers "0" Maximum number of pending connection attempts (defaults used if set to 0)
--minerthreads "8" Number of miner threads
--nat "any" NAT port mapping mechanism (any|none|upnp|pmp|extip:<IP>)
--nodekey P2P node key file
--rpcaddr "127.0.0.1" Listening address for the JSON-RPC server
--rpcport "8545" Port on which the JSON-RPC server should listen
--jspath "." JS library path to be used with console and js subcommands
--protocolversion "60" ETH protocol version (integer)
--blockchainversion "2" Blockchain version (integer)
--networkid "0" Network Id (integer)
--help, -h show help
--version, -v print the version
Example:
mist --asset_path /absolute/path/to/assets
WARNING: This is not available for the latest frontier poc9.
The same flags can be set via config file (by default <datadir>/conf.ini) as well as environment variables.
Precedence: default < config file < environment variables < command line