选择后台默认更新的日志：
[2026-05-01 07:57:29] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:29] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:29] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:29] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:1:0.0000:Retrieving file 1 of 3

[2026-05-01 07:57:30] dlstatus:12:0.0000:Retrieving file 12 of 13

[2026-05-01 07:57:30] dlstatus:12:0.0000:Retrieving file 12 of 13

[2026-05-01 07:57:30] dlstatus:12:0.0000:Retrieving file 12 of 13

[2026-05-01 07:57:30] dlstatus:12:0.0000:Retrieving file 12 of 13

[2026-05-01 07:57:30] dlstatus:37:0.0000:Retrieving file 37 of 37

[2026-05-01 07:57:30] dlstatus:37:0.0000:Retrieving file 37 of 37

[2026-05-01 07:57:30] dlstatus:47:100.0000:Retrieving file 47 of 47

[2026-05-01 08:01:14] {"progress":0,"description":"Starting backup process"}

[2026-05-01 08:01:29] {"progress":10,"description":"Merging modification directories"}

[2026-05-01 08:01:29] {"progress":30,"description":"Checking out system files"}

[2026-05-01 08:01:34] {"progress":50,"description":"Syncing system files"}

[2026-05-01 08:01:34] {"progress":70,"description":"Moving system files"}

[2026-05-01 08:01:35] {"progress":80,"description":"Committing"}

[2026-05-01 08:01:57] {"progress":10,"description":"Merging modification directories"}

[2026-05-01 08:01:57] {"progress":30,"description":"Checking out system files"}

[2026-05-01 08:02:00] {"progress":50,"description":"Syncing system files"}

[2026-05-01 08:02:01] {"progress":70,"description":"Moving system files"}

[2026-05-01 08:02:01] {"progress":80,"description":"Committing"}

[2026-05-01 08:02:20] {"progress":90,"description":"Checking out deploy directory"}

[2026-05-01 08:02:59] {"progress":100,"description":"Backup completed"}

执行如下命令：
yc@yc:$ sudo apt upgrade
W: 请使用 apt dist-upgrade' 更新系统，使用 apt upgrade' 可能造成系统更新不完整。
E: dpkg 被中断，您必须手工运行 ‘sudo dpkg --configure -a’ 解决此问题。
yc@yc:$ apt dist-upgrade
E: 无法打开锁文件 /var/lib/dpkg/lock-frontend - open (13: 权限不够)
E: 无法获取 dpkg 前端锁 (/var/lib/dpkg/lock-frontend)，请查看您是否正以 root 用户运行？
yc.@yc:$ sudo apt dist-upgrade
E: dpkg 被中断，您必须手工运行 ‘sudo dpkg --configure -a’ 解决此问题。
yc@yc:$ sudo dpkg --configure -a

再次打开系统更新，提示已经是最新的了，这是更新成功了吗？