The loadwallet RPC loads a wallet from a wallet file or directory.
loadwallet "filename"
*bitcoin-cli help loadwallet
loadwallet "filename" ( load_on_startup ) Loads a wallet from a wallet file or directory. Note that all wallet command-line options used when starting bitcoind will be applied to the new wallet. Arguments: 1. filename (string, required) The wallet directory or .dat file. 2. load_on_startup (boolean, optional) Save wallet name to persistent settings and load on startup. True to add wallet to startup list, false to remove, null to leave unchanged. Result: { (json object) "name" : "str", (string) The wallet name if loaded successfully. "warning" : "str" (string) Warning message if wallet was not loaded cleanly. } Examples: > bitcoin-cli loadwallet "test.dat" > curl --user myusername --data-binary '{"jsonrpc": "1.0", "id": "curltest", "method": "loadwallet", "params": ["test.dat"]}' -H 'content-type: text/plain;' http://127.0.0.1:8332/