Restoring a wallet from private keys is pretty simple. If you have the necessary information, with this guide you can completely restore your wallet. Note: you do NOT have to have your password to restore from keys.
You need to have 3 pieces of data from your wallet, or your .keys file which holds this info and the password to decrypt it. The 3 wallet components that you need are:
Next, you'll be asked for the Address, the spendkey, the viewkey, and finally the new password for the re-generated wallet.
Running this with the correct parameters will re-generate your wallet files for you and allow you to set a new password.
If you run into any trouble, running `./monero-wallet-cli --help` will show you the options available to you at wallet startup. Once you're inside your wallet, running the `help` command will list the help for the commands available to you within the wallet.
Select `Restore from keys`, give your wallet a name & storage location, and complete the `Account address (public)`, `View key (private)`&`Spend key (private)`. Optionaly, specify a `Restore height (optional)` to avoid scanning of oldest blocks. Then click the `Right` arrow: