Presenting some simple tweaks to make Ubuntu 18 a little more friendly.
Out of the box, the Ubuntu sort order ignores case. This may be convenient for Windows users, but it's not the Unix way. Add this to ~/.bashrc to restore the sort algorithm that respects case.
GNU Coreutils 8.25 changed the way that filenames are displayed when there is a space in the filename. In direct contravention of 45 years of historical Unix precedent, those filenames are now displayed encased in single quotes by default. To re-establish traditional Unix behavior, add this to ~/.bashrc.
The default system editor is 'nano'. From the command line, this will set it to the more Unixly-correct 'vi':