I’ve my bitcoin core daemon up and operating on Ubuntu. Nevertheless it all the time stops after operating for serveral hours or 1 day. Here is the debug.log earlier than it stopped.

2023-11-23T18:04:42Z [net] Noticed new cmpctblock header hash=000000000000000000019f034b4fed9b31aa4b5aad47c70cee86d784b5932216 peer=227
2023-11-23T18:04:43Z UpdateTip: new finest=000000000000000000019f034b4fed9b31aa4b5aad47c70cee86d784b5932216 top=818134 model=0x21dcc000 log2_work=94.557484 tx=924729575 date="2023-11-23T18:04:24Z" progress=1.000000 cache=109.0MiB(751559txo)
2023-11-23T18:15:43Z New outbound peer linked: model: 70016, blocks=818134, peer=720 (block-relay-only)
2023-11-23T18:18:12Z New outbound peer linked: model: 70016, blocks=818134, peer=725 (block-relay-only)
2023-11-23T18:33:21Z Noticed new header hash=00000000000000000000cc3699401d8fe6893369744fc8fcbc1913032e67242a top=818135
2023-11-23T18:33:21Z [net] Noticed new cmpctblock header hash=00000000000000000000cc3699401d8fe6893369744fc8fcbc1913032e67242a peer=5
2023-11-23T18:33:22Z UpdateTip: new finest=00000000000000000000cc3699401d8fe6893369744fc8fcbc1913032e67242a top=818135 model=0x20c00000 log2_work=94.557497 tx=924733362 date="2023-11-23T18:33:12Z" progress=1.000000 cache=109.6MiB(755110txo)
2023-11-23T18:33:22Z BlockUntilSyncedToCurrentChain: txindex is catching up on block notifications
2023-11-23T18:36:45Z New outbound peer linked: model: 70016, blocks=818135, peer=763 (block-relay-only)
2023-11-23T18:43:31Z New outbound peer linked: model: 70016, blocks=818135, peer=779 (block-relay-only)
2023-11-23T18:46:38Z Flushed charge estimates to fee_estimates.dat.
2023-11-23T18:48:57Z New outbound peer linked: model: 70016, blocks=818135, peer=791 (block-relay-only)
2023-11-23T18:49:35Z tor: Thread interrupt
2023-11-23T18:49:35Z Shutdown: In progress...
2023-11-23T18:49:35Z torcontrol thread exit
2023-11-23T18:49:35Z opencon thread exit
2023-11-23T18:49:35Z addcon thread exit
2023-11-23T18:49:35Z msghand thread exit
2023-11-23T18:49:35Z web thread exit
2023-11-23T18:49:35Z DumpAnchors: Flush 2 outbound block-relay-only peer addresses to anchors.dat began
2023-11-23T18:49:35Z DumpAnchors: Flush 2 outbound block-relay-only peer addresses to anchors.dat accomplished (0.01s)
2023-11-23T18:49:35Z scheduler thread exit
2023-11-23T18:49:36Z Writing 0 unbroadcast transactions to disk.
2023-11-23T18:49:36Z Dumped mempool: 0.27696s to repeat, 0.66744s to dump
2023-11-23T18:49:37Z Flushed charge estimates to fee_estimates.dat.
2023-11-23T18:49:40Z Shutdown: executed

I see it shutting down appropriately, however I did not do something to interrupt or cease the method.

I begin the daemon with: nohup bitcoin-core.daemon &

Is there something I can do to this?

Thanks quite a bit!