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geth:tldr:56e8a
The command "geth --testnet" is used to start the Geth client in testnet mode.
Geth is one of the most popular implementations of an Ethereum client, allowing users to interact with the Ethereum blockchain. Testnet is a separate network from the main Ethereum network and is used for testing purposes, allowing developers to experiment and deploy smart contracts without using real Ether or impacting the main network.
By running "geth --testnet", you are initiating the Geth client to connect to the testnet network, providing you with access to the testnet blockchain, test Ether, and other testing resources. This command will sync the Geth client with the testnet blockchain, allowing you to perform various Ethereum operations such as creating wallets, deploying and interacting with smart contracts, sending transactions, and more in a testing environment.
Running Geth in testnet mode is useful for developers, as they can test and debug their applications, smart contracts, or decentralized applications (dApps) without risking any real assets on the Ethereum mainnet. It helps ensure everything works as expected before deploying to the live network.