<fontconfig>
<alias>
<family>serif</family>
<prefer>
<family>Bitstream Vera Serif</family>
<family>SimSun</family>
<family>DejaVu Serif</family>
<family>AR PL ShanHeiSun Uni</family>
<family>AR PL ZenKai Uni</family>
</prefer>
</alias>
<alias>
<family>sans-serif</family>
<prefer>
<family>Bitstream Vera Sans</family>
<family>Simsun</family>
<family>DejaVu Sans</family>
<family>AR PL ShanHeiSun Uni</family>
<family>AR PL ZenKai Uni</family>
</prefer>
</alias>
<alias>
<family>monospace</family>
<prefer>
<family>Bitstream Vera Sans Mono</family>
<family>Simsun</family>
<family>DejaVu Sans Mono</family>
<family>AR PL ShanHeiSun Uni</family>
<family>AR PL ZenKai Uni</family>
</prefer>
</alias>
<match target="font" >
<test name="family" compare="contains" >
<string>SimSun</string>
<string>Song</string>
<string>Sun</string>
<string>Kai</string>
<string>Ming</string>
</test>
<test name="weight" compare="less_eq">
<int>100</int>
</test>
<test compare="more_eq" target="pattern" name="weight" >
<int>180</int>
</test>
<edit mode="assign" name="embolden" >
<bool>true</bool>
</edit>
</match>
<match target="font" >
<test name="family" compare="contains" >
<string>SimSun</string>
<string>宋体</string>
<string>宋体-18030</string>
<string>Song</string>
<string>Sun</string>
<string>Kai</string>
<string>Ming</string>
<string>黑体</string>
<string>新宋体</string>
<string>新宋体-18030</string>
<string>楷体_GB2312</string>
<string>仿宋_GB2312</string>
<string>隶体</string>
<string>SimSun-18030</string>
<string>SimHei</string>
<string>NSimSun</string>
<string>NSimSun-18030</string>
<string>KaiTi_GB2312</string>
<string>FangSong_GB2312</string>
<string>LiSu</string>
</test>
<edit name="globaladvance">
<bool>false</bool>
</edit>
<edit name="spacing">
<int>0</int>
</edit>
<edit name="hinting">
<bool>true</bool>
</edit>
<edit name="autohint">
<bool>false</bool>
</edit>
<edit name="antialias" mode="assign">
<bool>true</bool>
</edit>
<test name="pixelsize" compare="more_eq">
<int>12</int>
</test>
<test name="pixelsize" compare="less_eq">
<int>24</int>
</test>
<edit name="antialias" mode="assign" >
<bool>false</bool>
</edit>
</match>
</fontconfig>
这些命令代表什么意思，哪里有这方面详细的教程，资料
另外还有其它
sudo mkfontscale
sudo mkfontdir
sudo fc-cache
