How to find 'Settings' in ubuntu 18.04?

I've learned that 'Settings' can be found by typing:

gnome-control-center

For some reason, when I typed it, I found that it wasn't installed (anymore !). So I did:

sudo apt-get install gnome-control-center

Now 'Settings' appears in 'Show Applications' again.

It can be found by this command

sudo apt-get install gnome-control-center

But I don't know why you can't see in 'Show Applications' on the left bottom corner. I have also updated to Ubuntu 18.04 and I can see easily see "settings" You can try the above command.

Hope it works for you.

If running gnome-control-center produces diagnostic output complaining about a lib file (say /usr/lib/x86_64-linux-gnu/libnma.so.0) then reinstalling gnome-control-center may not necessarily resolve this issue.

What worked for me was to find out what package includes the offending file, and then reinstall it:

sudo apt install --reinstall libnma0

This should, hopefully, work for other lib files too.