200 lines
6.6 KiB
Groff
200 lines
6.6 KiB
Groff
.TH MINERD 1 "November 2013" "cpuminer 2.3.2"
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.SH NAME
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minerd \- CPU miner for Bitcoin and Litecoin
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.SH SYNOPSIS
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.B minerd
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[\fIOPTION\fR]...
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.SH DESCRIPTION
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.B minerd
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is a multi-threaded CPU miner for Bitcoin, Litecoin and other cryptocurrencies.
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It supports the getwork mining protocol as well as the Stratum mining protocol.
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.PP
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In its normal mode of operation, \fBminerd\fR connects to a mining server
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(specified with the \fB\-o\fR option), receives work from it and starts hashing.
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As soon as a solution is found, it is submitted to the same mining server,
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which can accept or reject it.
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When using the getwork protocol, \fBminerd\fR can take advantage
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of the long polling extension, if the server supports it;
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in any case, fresh work is fetched as needed.
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When using the Stratum protocol this is not possible,
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and the server is responsible for sending fresh work at least every minute;
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if it fails to do so,
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\fBminerd\fR may drop the connection and try reconnecting again.
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.PP
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By default, \fBminerd\fR writes all its messages to standard error.
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On systems that have a syslog, the \fB\-\-syslog\fR option can be used
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to write to it instead.
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.PP
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On start, the nice value of all miner threads is set to 19.
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On Linux, the scheduling policy is also changed to SCHED_IDLE,
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or to SCHED_BATCH if that fails.
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On multiprocessor systems, \fBminerd\fR
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automatically sets the CPU affinity of miner threads
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if the number of threads is a multiple of the number of processors.
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.SH EXAMPLES
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To connect to a Litecoin mining pool that provides a Stratum server
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at example.com on port 3333, authenticating as worker "foo" with password "bar":
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.PP
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.nf
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.RS
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minerd \-o stratum+tcp://example.com:3333 \-O foo:bar
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.RE
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.fi
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.PP
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To mine to a local Bitcoin testnet instance running on port 18332,
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authenticating with username "rpcuser" and password "rpcpass":
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.PP
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.nf
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.RS
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minerd \-a sha256d \-o http://localhost:18332 \-O rpcuser:rpcpass
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.RE
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.fi
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.PP
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To connect to a Litecoin P2Pool node running on my.server on port 9327,
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mining in the background and having output sent to the syslog facility,
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omitting the per-thread hashmeter output:
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.PP
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.nf
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.RS
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minerd \-BSq \-o http://my.server:9327
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.RE
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.fi
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.SH OPTIONS
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.TP
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\fB\-a\fR, \fB\-\-algo\fR=\fIALGORITHM\fR
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Set the hashing algorithm to use.
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Default is scrypt.
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Possible values are:
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.RS 11
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.TP 10
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.B scrypt
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scrypt(1024, 1, 1) (used by Litecoin)
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.TP
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.B sha256d
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SHA-256d (used by Bitcoin)
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.RE
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.TP
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\fB\-\-benchmark\fR
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Run in offline benchmark mode.
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.TP
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\fB\-B\fR, \fB\-\-background\fR
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Run in the background as a daemon.
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.TP
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\fB\-\-cert\fR=\fIFILE\fR
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Set a SSL certificate to use with the mining server.
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Only supported when using the HTTPS protocol.
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.TP
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\fB\-c\fR, \fB\-\-config\fR=\fIFILE\fR
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Load options from a configuration file.
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\fIFILE\fR must contain a JSON object
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mapping long options to their arguments (as strings),
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or to \fBtrue\fR if no argument is required.
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Sample configuration file:
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.nf
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{
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"url": "stratum+tcp://example.com:3333",
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"userpass": "foo:bar",
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"retry-pause": "10",
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"quiet": true
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}
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.fi
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.TP
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\fB\-D\fR, \fB\-\-debug\fR
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Enable debug output.
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.TP
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\fB\-h\fR, \fB\-\-help\fR
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Print a help message and exit.
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.TP
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\fB\-\-no\-longpoll\fR
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Do not use long polling.
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.TP
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\fB\-\-no\-stratum\fR
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Do not switch to Stratum, even if the server advertises support for it.
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.TP
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\fB\-o\fR, \fB\-\-url\fR=[\fISCHEME\fR://][\fIUSERNAME\fR[:\fIPASSWORD\fR]@]\fIHOST\fR:\fIPORT\fR[/\fIPATH\fR]
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Set the URL of the mining server to connect to.
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Supported schemes are \fBhttp\fR, \fBhttps\fR and \fBstratum+tcp\fR.
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If no scheme is specified, http is used.
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Specifying a \fIPATH\fR is only supported for HTTP and HTTPS.
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Specifying credentials has the same effect as using the \fB\-O\fR option.
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If no mining server is provided,
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the miner will try to connect to http://127.0.0.1:9332/,
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corresponding to the default settings for a local Litecoin daemon.
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.TP
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\fB\-O\fR, \fB\-\-userpass\fR=\fIUSERNAME\fR:\fIPASSWORD\fR
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Set the credentials to use for connecting to the mining server.
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Any value previously set with \fB\-u\fR or \fB\-p\fR is discarded.
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.TP
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\fB\-p\fR, \fB\-\-pass\fR=\fIPASSWORD\fR
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Set the password to use for connecting to the mining server.
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Any password previously set with \fB\-O\fR is discarded.
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.TP
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\fB\-P\fR, \fB\-\-protocol\-dump\fR
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Enable output of all protocol-level activities.
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.TP
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\fB\-q\fR, \fB\-\-quiet\fR
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Disable per-thread hashmeter output.
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.TP
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\fB\-r\fR, \fB\-\-retries\fR=\fIN\fR
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Set the maximum number of times to retry if a network call fails.
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If not specified, the miner will retry indefinitely.
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.TP
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\fB\-R\fR, \fB\-\-retry\-pause\fR=\fISECONDS\fR
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Set how long to wait between retries. Default is 30 seconds.
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.TP
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\fB\-s\fR, \fB\-\-scantime\fR=\fISECONDS\fR
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Set an upper bound on the time the miner can go without fetching fresh work.
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This setting has no effect in Stratum mode or when long polling is activated.
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Default is 5 seconds.
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.TP
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\fB\-S\fR, \fB\-\-syslog\fR
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Log to the syslog facility instead of standard error.
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.TP
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\fB\-t\fR, \fB\-\-threads\fR=\fIN\fR
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Set the number of miner threads.
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If not specified, the miner will try to detect the number of available processors
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and use that.
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.TP
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\fB\-T\fR, \fB\-\-timeout\fR=\fISECONDS\fR
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Set the timeout for long polling. Default is 270 seconds.
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.TP
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\fB\-u\fR, \fB\-\-user\fR=\fIUSERNAME\fR
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Set the username to use for connecting to the mining server.
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Any username previously set with \fB\-O\fR is discarded.
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.TP
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\fB\-V\fR, \fB\-\-version\fR
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Display version information and quit.
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.TP
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\fB\-x\fR, \fB\-\-proxy\fR=[\fISCHEME\fR://]\fIHOST\fR:\fIPORT\fR
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Connect to the mining server through a proxy.
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Supported schemes are: \fBhttp\fR, \fBsocks4\fR, \fBsocks5\fR.
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Since libcurl 7.18.0, the following are also supported:
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\fBsocks4a\fR, \fBsocks5h\fR (SOCKS5 with remote name resolving).
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If no scheme is specified, the proxy is treated as an HTTP proxy.
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HTTP proxies cannot be used to connect to Stratum servers.
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.SH ENVIRONMENT
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The following environment variables can be specified in lower case or upper case;
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the lower-case version has precedence. \fBhttp_proxy\fR is an exception
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as it is only available in lower case.
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.PP
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.RS
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.TP
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\fBhttp_proxy\fR [\fISCHEME\fR://]\fIHOST\fR:\fIPORT\fR
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Sets the proxy server to use for HTTP.
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.TP
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\fBHTTPS_PROXY\fR [\fISCHEME\fR://]\fIHOST\fR:\fIPORT\fR
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Sets the proxy server to use for HTTPS.
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.TP
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\fBALL_PROXY\fR [\fISCHEME\fR://]\fIHOST\fR:\fIPORT\fR
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Sets the proxy server to use if no protocol-specific proxy is set.
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.RE
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.PP
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Using an environment variable to set the proxy has the same effect as
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using the \fB\-x\fR option.
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.SH AUTHOR
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Most of the code in the current version of minerd was written by
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Pooler <pooler@litecoinpool.org> with contributions from others.
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The original minerd was written by Jeff Garzik <jeff@garzik.org>.
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