The loadwallet RPC loads a wallet from a wallet file or directory.
loadwallet "filename"
*bitcoin-cli help loadwallet
loadwallet "filename" 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 (eg -zapwallettxes, upgradewallet, rescan, etc). Arguments: 1. "filename" (string, required) The wallet directory or .dat file. Result: { "name" :, (string) The wallet name if loaded successfully. "warning" : , (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/