bitcoin core – Bitcoind does not work properly on the centOS server

I have just tried to configure the complete node in centos server (Linux distribution). I'm downloading the Linux binary from https://bitcoincore.org/bin/bitcoin-core-0.17.1/. I just started bitcoind using the following command

bitcoind -daemon

Result

Starting the Bitcoin server

Then, I just tested with bitcoin-cli using the following command

bitcoin-cli getbalance

Result

he returns the balance

Then I close my SSH terminal. And re connect. But at this point, bitcoind is not running. I do not know what is the reason for that. I've already tried the same process in Ubuntu 18.04. But it worked perfectly. Thank you for giving any idea to run bitcoind in the background (about one hundred).

Thank you