/etc/apt$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
linux-generic linux-headers-generic linux-image-generic
The following packages will be upgraded:
wireless-regdb
1 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.
Need to get 0 B/10.6 kB of archives.
After this operation, 1,024 B of additional disk space will be used.
Do you want to continue? [Y/n] y
(Reading database ... 137468 files and directories currently installed.)
Preparing to unpack .../wireless-regdb_2020.11.20-0ubuntu1~16.04.2_all.deb ...
Unpacking wireless-regdb (2020.11.20-0ubuntu1~16.04.2) over (2018.05.09-0ubuntu1) ...
dpkg: error processing archive /var/cache/apt/archives/wireless-regdb_2020.11.20-0ubuntu1~16.04.2_all.deb (--unpack):
trying to overwrite '/lib/crda/pubkeys/sforshee.key.pub.pem', which is also in package crda 3.18-1build1
Errors were encountered while processing:
/var/cache/apt/archives/wireless-regdb_2020.11.20-0ubuntu1~16.04.2_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
更改 ：sudo dpkg -i --force-overwrite /lib/crda/pubkeys/sforshee.key.pub.pem
sudo apt-get upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
linux-generic linux-headers-generic linux-image-generic
0 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.