Optimal Font Settings for Ubuntu or a modren linux based system

51-local.conf

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
    <match>
        <edit mode="prepend" name="family"><string>Noto Sans</string></edit>
    </match>
    <match target="pattern">
        <test qual="any" name="family"><string>serif</string></test>
        <edit name="family" mode="assign" binding="same"><string>Noto Serif</string></edit>
    </match>
    <match target="pattern">
        <test qual="any" name="family"><string>sans-serif</string></test>
        <edit name="family" mode="assign" binding="same"><string>Noto Sans</string></edit>
    </match>
    <match target="pattern">
        <test qual="any" name="family"><string>monospace</string></test>
        <edit name="family" mode="assign" binding="same"><string>Noto Mono</string></edit>
    </match>
</fontconfig>

gistfile1.txt

https://www.reddit.com/r/archlinux/comments/5r5ep8/make_your_arch_fonts_beautiful_easily/

ls -etc-fonts-conf.d

10-sub-pixel-rgb.conf                      49-sansserif.conf             64-14-tlwg-umpush.conf            69-language-selector-zh-sg.conf
10-unhinted.conf                           50-user.conf                  64-15-laksaman.conf               69-language-selector-zh-tw.conf
11-lcdfilter-default.conf                  51-local.conf                 64-21-tlwg-typo.conf              69-unifont.conf
20-unhint-small-dejavu-lgc-sans.conf       53-monospace-lcd-filter.conf  64-22-tlwg-typist.conf            70-no-bitmaps.conf
20-unhint-small-dejavu-lgc-sans-mono.conf  57-dejavu-sans.conf           64-23-tlwg-mono.conf              80-delicious.conf
20-unhint-small-dejavu-lgc-serif.conf      57-dejavu-sans-mono.conf      64-language-selector-prefer.conf  89-tlwg-garuda-synthetic.conf
20-unhint-small-dejavu-sans.conf           57-dejavu-serif.conf          65-0-fonts-guru-extra.conf        89-tlwg-kinnari-synthetic.conf
20-unhint-small-dejavu-sans-mono.conf      58-dejavu-lgc-sans.conf       65-droid-sans-fallback.conf       89-tlwg-laksaman-synthetic.conf
20-unhint-small-dejavu-serif.conf          58-dejavu-lgc-sans-mono.conf  65-fonts-persian.conf             89-tlwg-loma-synthetic.conf
20-unhint-small-vera.conf                  58-dejavu-lgc-serif.conf      65-fonts-takao-pgothic.conf       89-tlwg-umpush-synthetic.conf
30-cjk-aliases.conf                        60-latin.conf                 65-khmer.conf                     89-tlwg-waree-synthetic.conf
30-droid-noto-mono.conf                    64-01-tlwg-kinnari.conf       65-nonlatin.conf                  90-fonts-nanum.conf
30-metric-aliases.conf                     64-02-tlwg-norasi.conf        66-lohit-punjabi.conf             90-synthetic.conf
30-urw-aliases.conf                        64-11-tlwg-waree.conf         69-language-selector-zh-cn.conf   99-language-selector-zh.conf
40-nonlatin.conf                           64-12-tlwg-loma.conf          69-language-selector-zh-hk.conf   99pdftoopvp.conf
45-latin.conf                              64-13-tlwg-garuda.conf        69-language-selector-zh-mo.conf   README