bash 如何为 linux shell 设置 TERM 环境变量
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How to set TERM environment variable for linux shell
提问by David Crayford
I've got very odd problem when I set export TERM=xterm-256color in ~/.bash_profile. When I try to run nano or emacs I get the following errors.
当我在 ~/.bash_profile 中设置 export TERM=xterm-256color 时，我遇到了非常奇怪的问题。当我尝试运行 nano 或 emacs 时，出现以下错误。
nano:
纳米：
.rror opening terminal: xterm-256color
emacs:
电子邮件：
is not defined.type xterm-256color
If that is not the actual type of terminal you have,
use the Bourne shell command `TERM=... export TERM' (C-shell:
`setenv TERM ...') to specify the correct type. It may be necessary
to do `unset TERMINFO' (C-shell: `unsetenv TERMINFO') as well.
If I manually enter the following into the shell it works
如果我手动将以下内容输入到 shell 中，它会起作用
export TERM=xterm-256color
I'm stumped.
我难住了。
回答by tripleee
Looks like you have DOS line feeds in your .bash_profile. Don't edit files on Windows, and/or use a proper tool to copy them to your Linux system.
看起来您的.bash_profile. 不要在 Windows 上编辑文件，和/或使用适当的工具将它们复制到 Linux 系统。
Better yet, get rid of Windows.
更好的是，摆脱Windows。
In more detail, you probably can't see it, but the erroneous line actually reads
更详细地说，你可能看不到它，但错误的行实际上是
export TERM=xterm-256color^M
where ^Mis a literal DOS carriage return.
哪里^M是文字 DOS 回车。
Like @EtanReisner mentions in a comment, you should not be hard-coding this value in your login files, anyway. Linux tries very hard to set it to a sane value depending onthings like which terminal you are actually using and how you are connected. At most, you might want to override a particularvalue which the login process often chooses but which is not to your liking. Let's say you want to change to xterm-256coloriff the value is xterm:
就像@EtanReisner 在评论中提到的那样，无论如何你都不应该在登录文件中硬编码这个值。Linux 会非常努力地将其设置为合理的值，具体取决于您实际使用的终端以及您的连接方式。最多，您可能希望覆盖登录过程经常选择但不符合您喜好的特定值。假设您想更改为xterm-256coloriff 值是xterm：
case $TERM in xterm) TERM=xterm-256color;; esac
This is not a programming question and yet an extremely common question on StackOverflow. Please google before asking.
这不是一个编程问题，而是 StackOverflow 上一个非常常见的问题。提问前请先谷歌。
