xterm-color & 和有什么不一样?xterm-256color? [英] What is the difference between xterm-color & xterm-256color?

问题描述

我在尝试设置我的终端程序以使用颜色时遇到了 xterm-color 和 xterm-256color 作为选项 - 即你可以设置你的 TERM 环境变量之一.

I've come across both xterm-color and xterm-256color as options when trying to set up my terminal program to use color - i.e. you can set your TERM environment variable to either one.

我想知道是否有人可以描述两者之间的区别?

I was wondering if anyone can describe the difference between the two?

我在我的 Ubuntu 服务器和 Mac 上搜索过文档，但没有找到.我只能在 /usr/share/terminfo 中找到各种二进制文件.

I've searched for documentation on my Ubuntu server as well as my mac but haven't found any. I've only been able to find various binary files in /usr/share/terminfo.

推荐答案

xterm-256color 描述启用了 256 色支持的 Xterm.xterm-color 描述了 Xterm 的一个旧分支，它支持八种颜色.不推荐使用 xterm-color，因为它描述了一个功能较少的 Xterm 变体，您不太可能使用它.通常你会想要使用 xterm、xterm-16color 或 xterm-256color.

xterm-256color describes Xterm with support for 256 colors enabled. xterm-color describes an older branch of Xterm that supports eight colors. xterm-color is not recommended, since it describes a variant of Xterm that’s less functional and that you’re not likely to be using. Usually you’ll want to use xterm, xterm-16color or xterm-256color.

特别是，xterm-256color 是从 Mac OS X 10.7 Lion 开始的终端的默认值，次佳推荐值是 xterm-16color 或 xterm(仅描述了对八种 ANSI 颜色的支持).在 10.7 之前，xterm-color 是默认值，因为终端不支持推荐的 Xterm terminfo 值描述的一些关键功能，例如，背景颜色擦除 (BCE)，用于切换主/备用的现代代码屏幕，256 色.

In particular, xterm-256color is the default for Terminal starting with Mac OS X 10.7 Lion, with the next-best recommended values being xterm-16color or xterm (which only describes support for eight ANSI colors). Prior to 10.7, xterm-color was the default because Terminal didn’t support some critical features described by the recommended Xterm terminfo values, e.g., Background Color Erase (BCE), modern codes for switching main/alternate screens, 256 colors.

有时人们会明确地将 TERM 设置为 xterm-color(与推荐的 Xterm 值相反)以禁用功能或解决特定项目上可用 terminfo 值之间的不兼容性计算机和正在使用的终端模拟器.

Sometimes people explicitly set TERM to xterm-color (as opposed to the recommended Xterm values) to disable functionality or work around incompatibilities between the available terminfo values on a particular computer and the terminal emulator being used.

请注意，从技术上讲，Terminal 应该有自己的最新 terminfo 值来准确描述它支持哪些功能，而不是使用 Xterm 的值，但是:

Note that technically Terminal should have its own up-to-date terminfo values that describe exactly which features it supports, instead of using the values for Xterm, but:

1. 目前没有一个是最新的.nsterm 代表来自 NeXTSTEP 的 Terminal 的祖先.显然有人最近(过去几年的某个时间)更新了 nsterm，但我不知道这是否已进入 ncurses 发行版，并且它可能不完全是最新的10.7 中的终端.
2. 许多程序和外壳定制脚本明确检查$TERM 是否以(或等于)xterm 开头.因此，一些用户仍需要了解将推荐的 Xterm 值与终端一起使用以与这些值兼容.

1. There isn’t one that’s up to date currently. nsterm represents Terminal’s ancestor from NeXTSTEP. Someone apparently has updated nsterm recently (sometime in the past couple of years), but I don’t know whether that has made its way into the ncurses distribution, and it may not be completely up to date with Terminal in 10.7.
2. A number of programs and shell customization scripts explicitly check whether $TERM starts with (or is equal to) xterm. So some users would still need to know about using the recommended Xterm values with Terminal for compatibility with those.

如果您不熟悉 terminfo 系统，请查看 x-man-page://5/terminfo 手册页.此外，您还可以使用 infocmp 命令查看当前的 terminfo 设置或比较两个不同的设置，例如，infocmp xterm-color xterm-256color 将向您显示两者之间的所有差异那两个.

If you’re not familiar with the terminfo system, take a look at the x-man-page://5/terminfo man page. Also, you can use the infocmp command to view the current terminfo settings or compare two different ones, e.g., infocmp xterm-color xterm-256color will show you all the differences between those two.

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