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Settings icon missing in Ubuntu 19.10

No settings icon

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$ sudo apt remove --purge gnome-control-center
$ sudo apt install gnome-control-center
Reference:

Ubuntu initramfs boot error

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(initramfs) exit
(initramfs) fsck /dev/nvme0n1p1
(initramfs) xxxxx <y>?

Input y for every prompt

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(initramfs) exit
(initramfs) reboot
Reference: