我正在运行 kubuntu 21.04。我刚刚重启了系统，kubuntu 启动时安装了几个软件包，然后再次重启，然后才到达登录屏幕。
我以前从未见过这种行为，想知道我是否刚刚被黑客入侵并安装了 rootkit 或类似的东西。
这是正常行为吗？如果是，为什么？
非常感谢。
更新：
有人建议我检查一下我的系统日志。以下选定的几行来自 journalctl。（抱歉这么长，但我不确定可以省略哪些内容。）
请注意，事情似乎是从以我的用户 ID 而不是 root 执行的“更新包”开始的。
还请注意，“已获得 org.freedesktop.packagekit.package-install-untrusted 的授权”出现了几次。
PackageKit[1604]: get-updates transaction /1763_ebabdbea from uid 1000 finished with success after 224ms
PackageKit[1604]: uid 1000 is trying to obtain org.freedesktop.packagekit.system-sources-refresh auth (only_trusted:0)
PackageKit[1604]: uid 1000 obtained auth for org.freedesktop.packagekit.system-sources-refresh
PackageKit[1604]: refresh-cache transaction /1764_ccdbdabb from uid 1000 finished with success after 568ms
PackageKit[1604]: get-updates transaction /1765_edcaccdb from uid 1000 finished with success after 628ms
PackageKit[1604]: get-updates transaction /1766_deebedbd from uid 1000 finished with success after 188ms
PackageKit[1604]: resolve transaction /1767_bebabdcc from uid 1000 finished with success after 160ms
PackageKit[1604]: resolve transaction /1768_eebcaddb from uid 1000 finished with success after 145ms
PackageKit[1604]: get-updates transaction /1769_beacdacd from uid 1000 finished with success after 196ms
PackageKit[1604]: new update-packages transaction /1770_dcdcbcae scheduled from uid 1000
PackageKit[1604]: in /1770_dcdcbcae for update-packages package libsnmp-base;5.9+dfsg-3ubuntu1.21.04.1;all;ubuntu-hirsute-updates-main was updating for uid 1000
PackageKit[1604]: in /1770_dcdcbcae for update-packages package libsnmp40;5.9+dfsg-3ubuntu1.21.04.1;amd64;ubuntu-hirsute-updates-main was updating for uid 1000
PackageKit[1604]: update-packages transaction /1770_dcdcbcae from uid 1000 finished with success after 199ms
PackageKit[1604]: new update-packages transaction /1771_adacbbdb scheduled from uid 1000
PackageKit[1604]: update-packages transaction /1771_adacbbdb from uid 1000 finished with success after 185ms
PackageKit[1604]: get-updates transaction /1773_cbaeedcb from uid 1000 finished with success after 209ms
PackageKit[1604]: resolve transaction /1774_beaeddab from uid 1000 finished with success after 159ms
PackageKit[1604]: resolve transaction /1775_cadbdeda from uid 1000 finished with success after 142ms
systemd[1]: Stopping PackageKit Daemon...
systemd[1]: Stopped PackageKit Daemon.
pk-offline-update[626]: sent mode to plymouth 'updates'
pk-offline-update[626]: sent msg to plymouth 'Installing updates; this could take a while...'
pk-offline-update[626]: writing dummy results
pk-offline-update[626]: assigned role
dbus-daemon[627]: [system] Activating via systemd: service name='org.freedesktop.PackageKit' unit='packagekit.service' requested by ':1.2' (uid=0 pid=626 comm="/usr/libexec/pk-offline-update " label="unconfined")
systemd[1]: Starting PackageKit Daemon...
PackageKit[640]: daemon start
dbus-daemon[627]: [system] Successfully activated service 'org.freedesktop.PackageKit'
systemd[1]: Started PackageKit Daemon.
pk-offline-update[626]: status wait
PackageKit[640]: uid 0 is trying to obtain org.freedesktop.packagekit.package-install-untrusted auth (only_trusted:0)
pk-offline-update[626]: status waiting-for-auth
PackageKit[640]: new update-packages transaction /1776_cddadabc scheduled from uid 0
PackageKit[640]: uid 0 obtained auth for org.freedesktop.packagekit.package-install-untrusted
pk-offline-update[626]: status wait
pk-offline-update[626]: status setup
pk-offline-update[626]: status loading-cache
pk-offline-update[626]: percentage 0%
pk-offline-update[626]: percentage 100%
pk-offline-update[626]: sent msg to plymouth 'Installing Updates - 100%'
pk-offline-update[626]: percentage 0%
pk-offline-update[626]: percentage 50%
pk-offline-update[626]: sent msg to plymouth 'Installing Updates - 50%'
pk-offline-update[626]: percentage 100%
pk-offline-update[626]: sent msg to plymouth 'Installing Updates - 100%'
pk-offline-update[626]: percentage 0%
pk-offline-update[626]: percentage 100%
pk-offline-update[626]: sent msg to plymouth 'Installing Updates - 100%'
pk-offline-update[626]: status query
pk-offline-update[626]: status running
pk-offline-update[626]: status loading-cache
pk-offline-update[626]: status download
pk-offline-update[626]: status running
pk-offline-update[626]: percentage 0%
pk-offline-update[626]: package preparing libsnmp-base-5.9+dfsg-3ubuntu1.21.04.1.all (ubuntu-hirsute-updates-main)
pk-offline-update[626]: package decompressing libsnmp-base-5.9+dfsg-3ubuntu1.21.04.1.all (ubuntu-hirsute-updates-main)
pk-offline-update[626]: percentage 11%
pk-offline-update[626]: sent msg to plymouth 'Installing Updates - 11%'
pk-offline-update[626]: package finished libsnmp-base-5.9+dfsg-3ubuntu1.21.04.1.all (ubuntu-hirsute-updates-main)
pk-offline-update[626]: status install
pk-offline-update[626]: package installing libsnmp-base-5.9+dfsg-3ubuntu1.21.04.1.all (ubuntu-hirsute-updates-main)
pk-offline-update[626]: percentage 22%
pk-offline-update[626]: sent msg to plymouth 'Installing Updates - 22%'
pk-offline-update[626]: package finished libsnmp-base-5.9+dfsg-3ubuntu1.21.04.1.all (ubuntu-hirsute-updates-main)
pk-offline-update[626]: package preparing libsnmp40-5.9+dfsg-3ubuntu1.21.04.1.amd64 (ubuntu-hirsute-updates-main)
pk-offline-update[626]: package decompressing libsnmp40-5.9+dfsg-3ubuntu1.21.04.1.amd64 (ubuntu-hirsute-updates-main)
pk-offline-update[626]: percentage 33%
pk-offline-update[626]: sent msg to plymouth 'Installing Updates - 33%'
pk-offline-update[626]: package finished libsnmp40-5.9+dfsg-3ubuntu1.21.04.1.amd64 (ubuntu-hirsute-updates-main)
pk-offline-update[626]: package installing libsnmp40-5.9+dfsg-3ubuntu1.21.04.1.amd64 (ubuntu-hirsute-updates-main)
pk-offline-update[626]: percentage 44%
pk-offline-update[626]: sent msg to plymouth 'Installing Updates - 44%'
pk-offline-update[626]: package finished libsnmp40-5.9+dfsg-3ubuntu1.21.04.1.amd64 (ubuntu-hirsute-updates-main)
pk-offline-update[626]: package preparing libsnmp-base-5.9+dfsg-3ubuntu1.21.04.1.all (ubuntu-hirsute-updates-main)
pk-offline-update[626]: package finished libsnmp-base-5.9+dfsg-3ubuntu1.21.04.1.all (ubuntu-hirsute-updates-main)
pk-offline-update[626]: package installing libsnmp-base-5.9+dfsg-3ubuntu1.21.04.1.all (ubuntu-hirsute-updates-main)
pk-offline-update[626]: percentage 55%
pk-offline-update[626]: sent msg to plymouth 'Installing Updates - 55%'
pk-offline-update[626]: package finished libsnmp-base-5.9+dfsg-3ubuntu1.21.04.1.all (ubuntu-hirsute-updates-main)
pk-offline-update[626]: percentage 66%
pk-offline-update[626]: sent msg to plymouth 'Installing Updates - 66%'
pk-offline-update[626]: package preparing libsnmp40-5.9+dfsg-3ubuntu1.21.04.1.amd64 (ubuntu-hirsute-updates-main)
pk-offline-update[626]: package finished libsnmp40-5.9+dfsg-3ubuntu1.21.04.1.amd64 (ubuntu-hirsute-updates-main)
pk-offline-update[626]: package installing libsnmp40-5.9+dfsg-3ubuntu1.21.04.1.amd64 (ubuntu-hirsute-updates-main)
pk-offline-update[626]: percentage 77%
pk-offline-update[626]: sent msg to plymouth 'Installing Updates - 77%'
pk-offline-update[626]: package finished libsnmp40-5.9+dfsg-3ubuntu1.21.04.1.amd64 (ubuntu-hirsute-updates-main)
pk-offline-update[626]: percentage 88%
pk-offline-update[626]: sent msg to plymouth 'Installing Updates - 88%'
PackageKit[640]: in /1776_cddadabc for update-packages package libsnmp-base;5.9+dfsg-3ubuntu1.21.04.1;all;ubuntu-hirsute-updates-main was installing for uid 0
PackageKit[640]: in /1776_cddadabc for update-packages package libsnmp40;5.9+dfsg-3ubuntu1.21.04.1;amd64;ubuntu-hirsute-updates-main was installing for uid 0
PackageKit[640]: in /1776_cddadabc for update-packages package libsnmp-base;5.9+dfsg-3ubuntu1.21.04.1;all;ubuntu-hirsute-updates-main was installing for uid 0
pk-offline-update[626]: status finished
PackageKit[640]: in /1776_cddadabc for update-packages package libsnmp40;5.9+dfsg-3ubuntu1.21.04.1;amd64;ubuntu-hirsute-updates-main was installing for uid 0
PackageKit[640]: update-packages transaction /1776_cddadabc from uid 0 finished with success after 2119ms
pk-offline-update[626]: writing actual results
pk-offline-update[626]: rebooting
pk-offline-update[626]: sent mode to plymouth 'reboot'
pk-offline-update[626]: sent msg to plymouth 'Rebooting after installing updates…'
systemd[1]: Stopping PackageKit Daemon...
systemd[1]: Stopped PackageKit Daemon.
dbus-daemon[778]: [system] Activating via systemd: service name='org.freedesktop.PackageKit' unit='packagekit.service' requested by ':1.83' (uid=1000 pid=1522 comm="/usr/lib/x86_64-linux-gnu/libexec/DiscoverNotifier" label="unconfined")
systemd[1]: Starting PackageKit Daemon...
PackageKit[1549]: daemon start
dbus-daemon[778]: [system] Successfully activated service 'org.freedesktop.PackageKit'
systemd[1]: Started PackageKit Daemon.
PackageKit[1549]: get-updates transaction /1777_cdcdbbbe from uid 1000 finished with success after 239ms
PackageKit[1549]: uid 1000 is trying to obtain org.freedesktop.packagekit.system-sources-refresh auth (only_trusted:0)
PackageKit[1549]: uid 1000 obtained auth for org.freedesktop.packagekit.system-sources-refresh
PackageKit[1549]: refresh-cache transaction /1778_ecdaeede from uid 1000 finished with success after 2093ms
PackageKit[1549]: get-updates transaction /1779_cceabead from uid 1000 finished with success after 649ms
PackageKit[1549]: get-updates transaction /1780_ecebbbce from uid 1000 finished with success after 200ms
PackageKit[1549]: get-updates transaction /1781_bbedebab from uid 1000 finished with success after 190ms
PackageKit[1549]: get-updates transaction /1782_bebcdbea from uid 1000 finished with success after 189ms