Though each individual change may only make a few milliseconds of difference, it doesn’t take long for those milliseconds to add up. Studies have shown that the human eye can discern delays of as few as 100ms, so simply making a few changes sprinkled throughout your code can very easily have a noticeable effect on how well your website or app performs.

Man pages are written by sys-admin and developers for IT techs, and are intended more as a reference than as a how to. Man pages are very useful for people who are already familiar with Linux, Unix, and BSD operating systems. Use man pages when you just need to know the syntax for particular commands or configuration file, but they are not helpful for new Linux users. Man pages are not good for learning something new for the first time. Here are thirty best documentation sites on the web for learning Linux and Unix like operating systems.

The key things to take away from this article are:

• Set structure in percentages. This includes content areas, sidebars etc.
• Set type in rems with a pixel fallback for older browsers. This gives us a great amount of control with added scalability.
• Set type-related items in ems so that paddings et al scale with the font-size.
• Set line-heights in relative units. Or, even better, with no units at all.
• Don’t set measurements on components at all. They should remain fully fluid and ‘just work’ wherever you drop them.

cmus is a small, fast and powerful console music player for Unix-like operating systems.

Carefully explaining the basics of Linux command line, such as variables, enviroment, quotes… Although it is tailored toward beginners, even advanced users may find something they didn’t know about the command line in the article.

Mấy tối nay ngồi xem lại danh sách ReadItLater, bắt đầu đọc nhiều hơn chứ không chỉ nhét link vào danh sách rồi quên luôn như trước nữa. Một trong những trang xưa nhất là mẫu cầu Thê Húc, lưu từ hồi làm bài tập lớn Đồ hoạ máy tính kỳ 1 năm 4. Hồi đấy cả lớp lười, thầy giáo giao bài tập lớn từ đầu kỳ nhưng thấy thầy không nhắc gì nên anh em, không ai bảo ai, cứ ỉm đi. Đến lúc kết thúc môn, thầy giáo lúc đấy mới sờ đến bài tập thì thằng nào thằng nấy mới vắt chân lên cổ mà chạy. Riêng mình một thân một nhóm vì cái tội nghỉ nhiều, giao bài tập lúc nào cũng không biết =)) sau mấy ngày nhốt mình trên phòng, ăn uống linh tinh, ngủ trên ghế (không dám nằm giường vì sợ sẽ ngủ lâu) thì cũng có kết quả là mô hình Cột cờ Hà Nội xấu òm :)) Mô hình cầu Thê Húc kia không dùng được vì quá phức tạp với một thằng sinh viên nghỉ nhiều hơn là đến lớp. Giờ thì mọi kiến thức về đồ hoạ chắc đã bị gột sạch rồi, thật là phí phạm :-<

I’ve come to believe that there are few things in the digital photography world that Photoshop can’t do better than most other programs. HDR turns out to be one of them. Photoshop CS2 has a little-known (it seems) built-in HDR assembler that, while lacking the “make my photo look like a bucket of saturated paints gone awry” tone-mapping features of Photomatix, is capable of creating extremely realistic or extremely surreal HDR images.

Green IT is one of the hottest of today’s technology trends, and the GNU/Linux® community has risen to the challenge. Along with several corporate partners, the GNU/Linux operating system provides solutions for dealing with power consumption, carbon emissions, and e-waste.

You can copy command line output to X Windows clipboard directly using xclip command. You can read from standard input (keyboard), or from one or more files, and makes the data available as an X selection for pasting into any X applications such as gedit, OpenOffice or Firefox / email client. You can also print current X selection to standard out (screen or printer) form a shell prompt.

A CSS filter is a coding technique used to hide or show CSS markup depending on the browser, version number, or capabilities. Browsers have different interpretations of CSS behavior and different levels of support for the W3C standards. CSS filters are sometimes used to achieve consistent layout appearance in multiple browsers that do not have compatible rendering.