I was trying to run a partial upgrade my Ubuntu 18.04.6 LTS. But I am getting the following error
/etc/kernel/postinst.d/zz-update-grub:
Sourcing file `/etc/default/grub'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-5.4.0-109-generic
Found initrd image: /boot/initrd.img-5.4.0-109-generic
Found linux image: /boot/vmlinuz-5.4.0-107-generic
Found initrd image: /boot/initrd.img-5.4.0-107-generic
Found linux image: /boot/vmlinuz-5.4.0-105-generic
Found initrd image: /boot/initrd.img-5.4.0-105-generic
Found linux image: /boot/vmlinuz-4.15.0-176-generic
Found linux image: /boot/vmlinuz-4.15.0-175-generic
Found initrd image: /boot/initrd.img-4.15.0-175-generic
grep: /media/user_name/writable/etc/lsb-release: Input/output error
grep: /media/user_name/writable/etc/lsb-release: Input/output error
grep: /media/user_name/writable/etc/lsb-release: Input/output error
grep: /media/user_name/writable/etc/lsb-release: Input/output error
Adding boot menu entry for EFI firmware configuration
done
On my machine, I have lsb_release installed. But not sure if it is relevant or not.
Any suggestion to fix the error?
Edit 1
I run the sudo apt-get update before I got the partial upgrade prompt. The result is:
Hit:1 https://dl.winehq.org/wine-builds/ubuntu bionic InRelease
Hit:2 https://download.docker.com/linux/ubuntu bionic InRelease
Get:3 https://dl.yarnpkg.com/debian stable InRelease [17.1 kB]
Hit:4 https://cli.github.com/packages stable InRelease
Hit:5 https://deb.nodesource.com/node_12.x bionic InRelease
Hit:6 http://packages.microsoft.com/repos/vscode stable InRelease
Hit:7 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:8 http://ppa.launchpad.net/deadsnakes/ppa/ubuntu bionic InRelease
Err:3 https://dl.yarnpkg.com/debian stable InRelease
The following signatures were invalid: EXPKEYSIG 23E7166788B63E1E Yarn Packaging <yarn@dan.cx>
Hit:9 http://archive.canonical.com/ubuntu bionic InRelease
Hit:10 https://repo.fortinet.com/repo/6.4/ubuntu /bionic InRelease
Hit:11 http://ppa.launchpad.net/linuxuprising/java/ubuntu bionic InRelease
Hit:12 http://archive.ubuntu.com/ubuntu bionic InRelease
Hit:13 http://archive.ubuntu.com/ubuntu bionic-updates InRelease
Hit:14 http://archive.ubuntu.com/ubuntu bionic-backports InRelease
Hit:15 http://ppa.launchpad.net/snwh/ppa/ubuntu bionic InRelease
Hit:16 http://archive.ubuntu.com/ubuntu bionic-security InRelease
Hit:17 http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu bionic InRelease
Reading package lists... Done
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://dl.yarnpkg.com/debian stable InRelease: The following signatures were invalid: EXPKEYSIG 23E7166788B63E1E Yarn Packaging <yarn@dan.cx>
W: Failed to fetch https://dl.yarnpkg.com/debian/dists/stable/InRelease The following signatures were invalid: EXPKEYSIG 23E7166788B63E1E Yarn Packaging <yarn@dan.cx>
W: Some index files failed to download. They have been ignored, or old ones used instead.
