Some users may need specific support because of e.g. some visual impairment. Most accessibility features have to be enabled manually. Some boot parameters can be appended to enable accessibility features. Note that on most architectures the boot loader interprets your keyboard as a QWERTY keyboard.
The Debian installer supports several front-ends for asking questions, with varying convenience for accessibility: notably, text
uses plain text while newt
uses text-based dialog boxes. The choice can be made at the boot prompt, see the documentation for DEBIAN_FRONTEND
in Phần 5.3.2, “Tham số trình cài đặt Debian”.
Một số thiết bị khả năng truy cập nào đó là bảng thật được cắm vào bên trong máy tính, mà đọc văn bản một cách trực tiếp từ vùng nhớ ảnh động. Để hiệu lực thiết bị kiểu này, bạn cần phải tắt hỗ trợ cho vùng đệm khung bằng cách sử dụng tham số khởi động fb=false
. Tuy nhiên, việc này cũng giảm số các ngôn ngữ sẵn sàng.
For users with low vision, the installer can use a high-contrast color theme that makes it more readable. To enable it, append the theme=dark
boot parameter.
For users with low vision, the graphical installer has a very basic zoom support: the Control++ and Control+- shortcuts increase and decrease the font size.
Expert, Rescue, and Automated installation choices are also available with accessibility support. To access them, one has to first enter the “Advanced options” submenu from the boot menu by typing a
. When using a BIOS system (the boot menu will have beeped only once), this has to be followed by Enter. Then, to enable speech synthesis, s
can optionally be pressed (followed again by Enter when using a BIOS system). From there, various shortcuts can be used: x
for expert installation, r
for rescue mode, or a
for automated installation. When using a BIOS system, they must be followed by Enter.
The automated install choice allows to install Debian completely automatically by using preseeding, whose source can be entered after accessibility features get started. Preseeding itself is documented in Phụ lục B, Tự động hoá việc cài đặt bằng chèn sẵn.
Documentation on accessibility of the installed system is available on the Debian Accessibility wiki page.