Screen resolution, web browser and operating system are three important factors which we need to take into consideration when making web pages. The first one affects the width, height and layout of a page; the second mainly affects the layout (e.g. different browsers interpret CSS in different ways); and the third plays a critical role in the appearance of a page – it determines which kind of fonts to use.
Therefore we should find some font equivalents between Windows and Linux in order that our web pages look similar under different operating systems. In fact there are three basic font families, namely: sans (or sans-serif), serif, and monospace, and “Verdana”, “Georgia (or Times New Roman)” and “Courier New” are three corresponding fonts we usually use under Windows, while in Linux we may use these three equivalents: “Bitstream Vera Sans”, “Bitstream Charter”, and “Bitstream Vera Sans Mono”.
These are three sample pages under Ubuntu:
And these are under Windows XP:
Donate
As a freelancer (currently working as a contractor) and a dad of three kids, I truly appreciate your donation to support my writing and open-source software development! Your contribution helps me cope with financial uncertainty better, so I can spend more time on producing high-quality content and software. You can make a donation through methods below.
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Venmo:
@yihui_xie, or Zelle:xie@yihui.name -
Paypal
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If you have a Paypal account, you can follow the link https://paypal.me/YihuiXie or find me on Paypal via my email
xie@yihui.name. Please choose the payment type as “Family and Friends” (instead of “Goods and Services”) to avoid extra fees. -
If you don’t have Paypal, you may donate through this link via your debit or credit card. Paypal will charge a fee on my side.
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Other ways:
WeChat Pay (微信支付：谢益辉) Alipay (支付宝：谢益辉) 
When sending money, please be sure to add a note “gift” or “donation” if possible, so it won’t be treated as my taxable income but a genuine gift. Needless to say, donation is completely voluntary and I appreciate any amount you can give.
Please feel free to email me if you prefer a different way to give. Thank you very much!
I’ll give back a significant portion of the donations to the open-source community and charities. For the record, I received about $30,000 in total (before tax) in 2024-25, and gave back about $15,000 (after tax).