Minha máquina Ubuntu (com a área de trabalho XFCE) deve estar sempre ativa porque eu a utilizo como um servidor de backup. É uma velha máquina desktop da HP. Durante o fim de semana eu não consegui alcançá-lo via SSH (OpenSSH). Quando tive a oportunidade de visitá-lo hoje, segunda-feira, estava desligado. Eu estou querendo saber porque desligou e apreciaria alguma ajuda. Por favor diga med se eu deveria adicionar mais informações. O log do sistema diz o seguinte para o último dia em que estava em execução:
Jul 23 03:21:44 int160 NetworkManager[711]: <info> [1469236904.0406] dhcp4 (enp63s0): state changed bound -> bound
Jul 23 03:21:44 int160 dbus[664]: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service'
Jul 23 03:21:44 int160 dhclient[821]: bound to 130.237.205.245 -- renewal in 17465 seconds.
Jul 23 03:21:44 int160 systemd[1]: Starting Network Manager Script Dispatcher Service...
Jul 23 03:21:44 int160 dbus[664]: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
Jul 23 03:21:44 int160 nm-dispatcher: req:1 'dhcp4-change' [enp63s0]: new request (1 scripts)
Jul 23 03:21:44 int160 nm-dispatcher: req:1 'dhcp4-change' [enp63s0]: start running ordered scripts...
Jul 23 03:21:44 int160 systemd[1]: Started Network Manager Script Dispatcher Service.
Jul 23 03:25:01 int160 CRON[9873]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Jul 23 03:35:01 int160 CRON[9999]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Jul 23 03:45:01 int160 CRON[10137]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Jul 23 03:55:01 int160 CRON[10252]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Jul 23 04:05:01 int160 CRON[10350]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Jul 23 04:15:01 int160 CRON[10434]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Jul 23 04:17:01 int160 CRON[10463]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Jul 23 04:25:01 int160 CRON[10545]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Jul 23 04:35:01 int160 CRON[10604]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Jul 23 04:45:01 int160 CRON[10661]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Jul 23 04:49:03 int160 systemd[1]: Starting Automatically refresh installed snaps...
Jul 23 04:49:03 int160 /usr/lib/snapd/snapd[704]: daemon.go:181: DEBUG: uid=0;@ GET /v2/find?q=&select=refresh 259.215029ms 200
Jul 23 04:49:03 int160 /usr/lib/snapd/snapd[704]: daemon.go:181: DEBUG: uid=0;@ GET /v2/snaps 81.209µs 200
Jul 23 04:49:03 int160 snap[10684]: No snaps are installed yet. Try 'snap install hello-world'.
Jul 23 04:49:03 int160 systemd[1]: Started Automatically refresh installed snaps.
Jul 23 04:49:03 int160 systemd[1]: snapd.refresh.timer: Adding 2h 15min 16.921260s random time.
Jul 23 04:49:03 int160 systemd[1]: snapd.refresh.timer: Adding 3h 58min 57.466385s random time.
Jul 23 04:55:01 int160 CRON[10723]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)