Lets say I printed out a paper wallet for monero and put it on my website. Now I want to sweep all the coins from this wallet into my own address. How can this be done in the cli and gui? Then I want to delete this private key from my wallet.
Then a few weeks pass, this account has coins again. Do I do the same process again?
If you have a paper wallet which you received funds to, you don't need to sweep the funds to use them (sweeping means sending all funds to some address), you just need to restore the wallet.
A paper wallet may be a 25-words electrum-style seed (supported by the official wallet), or it can be the two private keys (spend+view).
Restoring from a 25 words seed:
monero-wallet-cli --restore-deterministic-wallet --electrum-seed <your_seed>
Restoring from private keys:
monero-wallet-cli --generate-from-keys <wallet_name>
Then you will be asked to enter your address and both private keys.
Restoring with the GUI is very straightforward. Open the GUI, choose your language, and then choose the option 'Restore wallet from keys or mnemonic seed' (something like that, depends on your language). Then choose between seed/keys and fill the necessary fields.
Then a few weeks pass, this account has coins again. Do I do the same process again?
If you just plan on receiving funds to your wallet, without using them, you shouldn't do anything. Receiving funds does not require any action from your side. You should restore your wallet only when you want to spend your funds.
