我来更新一下现在的情况。原来的系统是Ubuntu 18.04。现在完全重装了20.04. 跑一下原来的程序，电脑再次不行了（和以前一样，ssh 连不上了）。重启后，我到log里面看了一下，好像和以前不一样了。
Oct 21 22:07:47 bioinfo2 systemd[1]: session-20.scope: Succeeded.
Oct 21 22:07:47 bioinfo2 systemd[3499]: pulseaudio.service: Succeeded.
Oct 21 22:07:47 bioinfo2 systemd[10455]: pulseaudio.service: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[1]: Stopping User Manager for UID 1001...
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopped target Main User Target.
Oct 21 22:07:57 bioinfo2 gvfsd[10489]: A connection to the bus can't be made
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopping D-Bus User Message Bus...
Oct 21 22:07:57 bioinfo2 tracker-miner-fs[10464]: Received signal:15->'Terminated'
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopping Virtual filesystem service - Apple File Conduit monitor...
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopping Virtual filesystem service...
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopping Virtual filesystem service - GNOME Online Accounts monitor...
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopping Virtual filesystem service - digital camera monitor...
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopping Virtual filesystem service - Media Transfer Protocol monitor...
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopping Virtual filesystem service - disk device monitor...
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopping Tracker file system data miner...
Oct 21 22:07:57 bioinfo2 tracker-miner-f[10464]: Error while sending AddMatch() message: The connection is closed
Oct 21 22:07:57 bioinfo2 tracker-miner-f[10464]: message repeated 2 times: [ Error while sending AddMatch() message: The connection is closed]
Oct 21 22:07:57 bioinfo2 systemd[10455]: gvfs-goa-volume-monitor.service: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopped Virtual filesystem service - GNOME Online Accounts monitor.
Oct 21 22:07:57 bioinfo2 systemd[10455]: gvfs-afc-volume-monitor.service: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopped Virtual filesystem service - Apple File Conduit monitor.
Oct 21 22:07:57 bioinfo2 systemd[10455]: gvfs-udisks2-volume-monitor.service: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopped Virtual filesystem service - disk device monitor.
Oct 21 22:07:57 bioinfo2 systemd[2099]: run-user-1001-gvfs.mount: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: run-user-1001-gvfs.mount: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: gvfs-mtp-volume-monitor.service: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopped Virtual filesystem service - Media Transfer Protocol monitor.
Oct 21 22:07:57 bioinfo2 systemd[3499]: run-user-1001-gvfs.mount: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[1]: run-user-1001-gvfs.mount: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: gvfs-gphoto2-volume-monitor.service: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopped Virtual filesystem service - digital camera monitor.
Oct 21 22:07:57 bioinfo2 systemd[10455]: gvfs-daemon.service: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopped Virtual filesystem service.
Oct 21 22:07:57 bioinfo2 systemd[10455]: dbus.service: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopped D-Bus User Message Bus.
Oct 21 22:07:57 bioinfo2 tracker-miner-fs[10464]: OK
Oct 21 22:07:57 bioinfo2 systemd[10455]: tracker-miner-fs.service: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopped Tracker file system data miner.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopped target Basic System.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopped target Paths.
Oct 21 22:07:57 bioinfo2 systemd[10455]: ubuntu-report.path: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopped Pending report trigger for Ubuntu Report.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopped target Sockets.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Stopped target Timers.
Oct 21 22:07:57 bioinfo2 systemd[10455]: dbus.socket: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Closed D-Bus User Message Bus Socket.
Oct 21 22:07:57 bioinfo2 systemd[10455]: dirmngr.socket: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Closed GnuPG network certificate management daemon.
Oct 21 22:07:57 bioinfo2 systemd[10455]: gpg-agent-browser.socket: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Closed GnuPG cryptographic agent and passphrase cache (access for web browsers).
Oct 21 22:07:57 bioinfo2 systemd[10455]: gpg-agent-extra.socket: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Closed GnuPG cryptographic agent and passphrase cache (restricted).
Oct 21 22:07:57 bioinfo2 systemd[10455]: gpg-agent-ssh.socket: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Closed GnuPG cryptographic agent (ssh-agent emulation).
Oct 21 22:07:57 bioinfo2 systemd[10455]: gpg-agent.socket: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Closed GnuPG cryptographic agent and passphrase cache.
Oct 21 22:07:57 bioinfo2 systemd[10455]: pk-debconf-helper.socket: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Closed debconf communication socket.
Oct 21 22:07:57 bioinfo2 systemd[10455]: pulseaudio.socket: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Closed Sound System.
Oct 21 22:07:57 bioinfo2 systemd[10455]: snapd.session-agent.socket: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Closed REST API socket for snapd user session agent.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Reached target Shutdown.
Oct 21 22:07:57 bioinfo2 systemd[10455]: systemd-exit.service: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Finished Exit the Session.
Oct 21 22:07:57 bioinfo2 systemd[10455]: Reached target Exit the Session.
Oct 21 22:07:57 bioinfo2 systemd[1]: user@1001.service: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[1]: Stopped User Manager for UID 1001.
Oct 21 22:07:57 bioinfo2 systemd[1]: Stopping User Runtime Directory /run/user/1001...
Oct 21 22:07:57 bioinfo2 systemd[3499]: run-user-1001.mount: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[2099]: run-user-1001.mount: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[1]: run-user-1001.mount: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[1]: user-runtime-dir@1001.service: Succeeded.
Oct 21 22:07:57 bioinfo2 systemd[1]: Stopped User Runtime Directory /run/user/1001.
Oct 21 22:07:57 bioinfo2 systemd[1]: Removed slice User Slice of UID 1001.
Oct 21 22:17:01 bioinfo2 CRON[11926]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Oct 21 22:18:33 bioinfo2 kernel: [18590.906772] perf: interrupt took too long (36821 > 36731), lowering kernel.perf_event_max_sample_rate to 5250
Oct 21 22:22:14 bioinfo2 NetworkManager[1921]: <info> [1634869334.0523] manager: NetworkManager state is now CONNECTED_SITE
Oct 21 22:22:14 bioinfo2 whoopsie[2616]: [22:22:14] Cannot reach:
https://daisy.ubuntu.comOct 21 22:22:14 bioinfo2 whoopsie[2616]: [22:22:14] offline
Oct 21 22:22:14 bioinfo2 dbus-daemon[1919]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.11' (uid=0 pid=1921 comm="/usr/sbin/NetworkManager --no-daemon " label="unconfined")
Oct 21 22:22:14 bioinfo2 systemd[1]: Starting Network Manager Script Dispatcher Service...
Oct 21 22:22:14 bioinfo2 dbus-daemon[1919]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Oct 21 22:22:14 bioinfo2 systemd[1]: Started Network Manager Script Dispatcher Service.
Oct 21 22:22:18 bioinfo2 NetworkManager[1921]: <info> [1634869338.1859] manager: NetworkManager state is now CONNECTED_GLOBAL
Oct 21 22:22:18 bioinfo2 whoopsie[2616]: [22:22:18] Cannot reach:
https://daisy.ubuntu.comOct 21 22:22:18 bioinfo2 whoopsie[2616]: [22:22:18] The default IPv4 route is: /org/freedesktop/NetworkManager/ActiveConnection/1
Oct 21 22:22:18 bioinfo2 whoopsie[2616]: [22:22:18] Not a paid data plan: /org/freedesktop/NetworkManager/ActiveConnection/1
Oct 21 22:22:18 bioinfo2 whoopsie[2616]: [22:22:18] Found usable connection: /org/freedesktop/NetworkManager/ActiveConnection/1
Oct 21 22:22:19 bioinfo2 whoopsie[2616]: [22:22:19] online
Oct 21 22:22:28 bioinfo2 systemd[1]: NetworkManager-dispatcher.service: Succeeded.
诸位高手能否看看这是什么问题？谢谢
【 在 RuralHunter 的大作中提到: 】
:
https://www.cnblogs.com/RXDXB/p/12605529.html: 自己搜一下。
:
--
FROM 150.182.175.*