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In here it's said we need to run below command line to let Metamask connect to geth:

 geth --rpc --rpccorsdomain="chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn"

I'm running a private blockchain and when I run the above command line it tries to synchronise and it takes a very long time. It looks like it is connecting to a real blockchain network which I don't need right now.

Obviously, I need Metamask, as I want to write my own user interface that can interact with my private blockchain (or smart contract).

Question: Do I need to run the above (or any other) command line to let Metamask connect to geth when I'm using a private blockchain?

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If I got you correctly, To connect metamask to geth:

  • Open Metamask
  • Click on Networks Tab ( where you see 'Main Ethereum Network')
  • If you are running geth on localhost:8080, choose option localhost:8080 from the dropdown. Else,
  • Choose option Custom RPC from the dropdown
  • Enter RPC address and Port of geth node inside New Network input box (eg, http://localhost:8013)
  • Your metamask is connected with your geth node

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