Fedora 26

# 默认系统使用 Cantarell 11 字体. 如果不希望使用此字体或者改变字体字号大小, 可以使用 gsettings 命令修改.

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gsettings set org.gnome.desktop.wm.preferences titlebar-font 'Cantarell Bold 11'
gsettings set org.gnome.desktop.interface font-name 'Cantarell 11'
gsettings set org.gnome.desktop.interface document-font-name 'Sans 11'
gsettings set org.gnome.desktop.interface monospace-font-name "Monospace 11"
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gsettings reset org.gnome.desktop.wm.preferences theme

gsettings reset org.gnome.desktop.wm.preferences titlebar-font
gsettings reset org.gnome.desktop.interface font-name
gsettings reset org.gnome.desktop.interface document-font-name
gsettings reset org.gnome.desktop.interface monospace-font-name
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# In GNOME 3 desktop icons are hidden by default.
gsettings get org.gnome.desktop.background show-desktop-icons

gsettings set org.gnome.desktop.background show-desktop-icons true
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https://www.systutorials.com/298/fedora-%e4%b8%ad%e6%96%87%e5%ad%97%e4%bd%93%e8%ae%be%e7%bd%ae/

将系统字体修改为使用 Sans 10号字体:
gsettings set org.gnome.desktop.interface font-name 'Sans 10'

使用默认字体 (Cantarell 11号字体):
gsettings set org.gnome.desktop.interface font-name 'Cantarell 11'

修改为10号 Cantarell 字体:
gsettings set org.gnome.desktop.interface font-name 'Cantarell 10'

查询使用的字体:
gsettings get org.gnome.desktop.interface font-name

将字体平滑选项打开
在Gnome 3中可以使用gnome-tweak-tool来设置字体平滑:
dnf install gnome-tweak-tool
gnome-tweak-tool