各位大佬好！我目前用的是 Ubuntu 22.04.1 LTS，桌面环境是KDE Frameworks Version 5.92.0。刚才打开Discover的时候，看到有两个待更新的固件：

• Dell System Firmware
• UEFI dbx

但我点安装之后，直接弹出了错误提示：“The input is not of cabinet format”，试了好几次都是这样。我平时不太会用命令行找固件更新，刚才试着用aptitude更新了系统，结果也没解决问题，具体的命令和输出我贴在下面了：

sudo aptitude update

Hit http://pt.archive.ubuntu.com/ubuntu jammy InRelease

Hit http://pt.archive.ubuntu.com/ubuntu jammy-updates InRelease

Get: 1 http://security.ubuntu.com/ubuntu jammy-security InRelease [110 kB]

Hit http://pt.archive.ubuntu.com/ubuntu jammy-backports InRelease

Hit https://dl.google.com/linux/chrome/deb stable InRelease

Fetched 110 kB in 11s (10,4 kB/s)

sudo aptitude full-upgrade

No packages will be installed, upgraded, or removed.

0 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Need to get 0 B of archives. After unpacking 0 B will be used.

有没有朋友遇到过类似的问题？能不能教教我怎么处理，才能顺利安装这两个固件更新呀？

备注：内容来源于stack exchange，提问作者Fernando Césár