I usually start the daemon with "./src/hyperstaked &" and then communicate with it via RPC calls such as "./src/hyperstaked getinfo"
It works. Thanks.
And one more question: is it safe for staking to start same wallet on my local PC, while it still running on vps?
Yes it is absolutely safe. One thing I would recommend is having your vps always staking, and your local PC only for sending and receiving transactions.
Don't forget to set custom change address to your main balance address when you spend your coins. Otherwise your VPS wallet file won't be consistent with a wallet file on your local machine (which is not good for backup purposes). It's also important to note that for the sake of security you should delete the bash history on the VPS node every time you open an encrypted wallet for minting from a command line via SSH. It can be done with the following command (in the console window where you have entered the passphrase): "history -cw && shred ~/.bash_history -n 3 -z".