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+---
+layout: forum
+title: 'Command Line and JSON-RPC'
+grand_parent: Forum Posts
+parent: Bitcoin Forum
+nav_order: 67
+date: 2010-02-23 22:15:41 UTC
+original: https://bitcointalk.org/index.php?topic=63.msg452#msg452
+---
+
+# Command Line and JSON-RPC
+
+---
+
+```
+Command Line and JSON-RPC
+February 23, 2010, 10:15:41 PM	
+
+Version 0.2.6 on SVN can now run as a daemon and be controlled by command line or JSON-RPC.
+
+On Linux it needs libgtk2.0-0 installed, but does not need a GUI running.  Hopefully gtk can be installed without having a windowing system installed.
+
+The command to start as a daemon is:
+bitcoin -daemon [switches...]
+
+Or, to run the UI normally and also be able to control it from command line or JSON-RPC, use the "-server" switch.
+bitcoin -server [switches...]
+
+With either switch, it runs an HTTP JSON-RPC server that accepts local socket connections on 127.0.0.1:8332.  The port is bound to loopback and can only be accessed from the local machine, but from any account, not just the user it's running under.
+
+To control it from the command line, the interface is a command name without any switches, followed by parameters if any.
+bitcoin <command> [params...]
+
+For example:
+bitcoin getinfo
+bitcoin getdifficulty
+bitcoin setgenerate true
+bitcoin stop
+
+It's a simple JSON-RPC client and prints the JSON result.  Look at rpc.cpp for the list of commands.
+
+Web apps or anything automated will normally use JSON-RPC directly, not command line.  There are JSON-RPC libraries for all the major languages.  In script languages like PHP and Python the syntax is as natural as calling a local function.
+```