blocks|key|752178|text|终端使用environment+variables来确定使用哪个character+set，因此您可以通过查看这些变量来确定它：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|752179|echo+$LC_CTYPE|code-block|syntax|javascript|752180|或|752181|echo+$LANG|752182|entityMap|0|LINK|mutability|MUTABLE|url|http://tldp.org/LDP/Bash-Beginners-Guide/html/sect_03_02.html|1|https://en.wikipedia.org/wiki/Character_encoding#Character_sets.2C_maps_and_code_pages^0|4|L|0|W|D|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]|$A|10|B|11|1|12]]|C|$]]|$1|D|3|E|5|F|7|13|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|14|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|15|8|@]|9|@]|C|$G|H]]|$1|M|3|-4|5|6|7|16|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]|U|$5|P|Q|R|C|$S|V]]]]

The terminal uses <a href="http://tldp.org/LDP/Bash-Beginners-Guide/html/sect_03_02.html" rel="noreferrer">environment variables</a> to determine which <a href="https://en.wikipedia.org/wiki/Character_encoding#Character_sets.2C_maps_and_code_pages" rel="noreferrer">character set</a> to use, therefore you can determine it by looking at those variables:

<pre><code>echo $LC_CTYPE
</code></pre>

or

<pre><code>echo $LANG
</code></pre>

blocks|key|752199|text|检查编码和语言：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|752200|$+echo+$LC_CTYPE
ISO-8859-1
$+echo+$LANG
pt_BR|code-block|syntax|javascript|752201|获取所有语言：|752202|$+locale+-a|752203|更改为pt_PT.utf8：|752204|$+export+LC_ALL=pt_PT.utf8+
$+export+LANG="$LC_ALL"|752205|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Check encoding and language:

<pre><code>$ echo $LC_CTYPE
ISO-8859-1
$ echo $LANG
pt_BR
</code></pre>

Get all languages:

<pre><code>$ locale -a
</code></pre>

Change to pt_PT.utf8:

<pre><code>$ export LC_ALL=pt_PT.utf8 
$ export LANG="$LC_ALL"
</code></pre>

blocks|key|752254|text|不带参数的locale命令将打印除LANGUAGE之外的所有相关环境变量的值。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|752255|对于当前编码：|752256|locale+charmap|code-block|syntax|javascript|752257|对于可用的区域设置：|752258|locale+-a|752259|对于可用的编码：|752260|locale+-m|752261|entityMap^0|5|6|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Z|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|10|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|11|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|12|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|13|8|@]|D|@]|E|$]]|$1|S|3|T|5|J|7|14|8|@]|D|@]|E|$K|L]]|$1|U|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|V|$]]

<code>locale</code> command with no arguments will print the values of all of the relevant environment variables except for LANGUAGE.

For current encoding: 

<pre><code>locale charmap
</code></pre>

For available locales: 

<pre><code>locale -a
</code></pre>

For available encodings:

<pre><code>locale -m
</code></pre>

blocks|key|967888|text|据我所知，没有。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|967889|来自$LC_CTYPE、locale等的间接指示可能看起来很诱人，但它们与终端应用程序(实际上是模拟器)在屏幕上显示字符时恰好使用的编码是完全分开的。|offset|length|style|CODE|967890|他们确定检测编码的唯一方法是输出编码中存在的东西，例如ä，截图，分析图像并检查输出的字符是否正确。|967891|所以，遗憾的是，这是不可能的。|967892|entityMap^0|0|2|9|C|6|0|R|1|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@$D|P|E|Q|F|G]|$D|R|E|S|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|T|8|@$D|U|E|V|F|G]]|9|@]|A|$]]|$1|J|3|K|5|6|7|W|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|M|$]]

To my knowledge, no.

Circumstantial indications from <code>$LC_CTYPE</code>, <code>locale</code> and such might seem alluring, but these are completely separated from the encoding the terminal application (actually an emulator) happens to be using when displaying characters on the screen.

They only way to detect encoding for sure is to output something only present in the encoding, e.g. <code>ä</code>, take a screenshot, analyze that image and check if the output character is correct.

So no, it's not possible, sadly.

blocks|key|967910|text|如果你有Python：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|967911|python+-c+"import+sys;+print(sys.stdout.encoding)"|code-block|syntax|javascript|967912|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you have Python:

<pre><code>python -c "import sys; print(sys.stdout.encoding)"
</code></pre>

blocks|key|967961|text|要查看当前的语言环境信息，请使用locale命令。以下是RHEL+7.8上的一个示例|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|967962|[usr@host+~]$+locale
LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=|code-block|syntax|javascript|967963|entityMap^0|G|6|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

To see the current locale information use <code>locale</code> command. Below is an example on RHEL 7.8
<pre><code>[usr@host ~]$ locale
LANG=en_US.UTF-8
LC_CTYPE=&quot;en_US.UTF-8&quot;
LC_NUMERIC=&quot;en_US.UTF-8&quot;
LC_TIME=&quot;en_US.UTF-8&quot;
LC_COLLATE=&quot;en_US.UTF-8&quot;
LC_MONETARY=&quot;en_US.UTF-8&quot;
LC_MESSAGES=&quot;en_US.UTF-8&quot;
LC_PAPER=&quot;en_US.UTF-8&quot;
LC_NAME=&quot;en_US.UTF-8&quot;
LC_ADDRESS=&quot;en_US.UTF-8&quot;
LC_TELEPHONE=&quot;en_US.UTF-8&quot;
LC_MEASUREMENT=&quot;en_US.UTF-8&quot;
LC_IDENTIFICATION=&quot;en_US.UTF-8&quot;
LC_ALL=
</code></pre>

blocks|key|968030|text|对xterm控制字符文档https://invisible-island.net/xterm/ctlseqs/ctlseqs.html的检查表明，它遵循ISO2022字符集切换标准。特别是，ESC+%25G选择UTF-8。因此，要强制终端使用UTF-8，需要发送此命令。我找不到方法来查询当前正在使用的字符集，但是有方法可以发现终端是否支持国家替换字符集。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|968031|然而，从charsets(7)上看，GBK+(或GB2312)似乎不是ISO2022支持的编码，xterm本身也不支持它。所以您最好的选择可能是使用iconv转换为UTF-8。|968032|进一步的reading显示，GBK的一个(重要)子集是EUC，这是一个ISO2022代码，所以支持ISO2022的终端毕竟能够以本机方式显示GBK，但我找不到任何提到以编程方式激活它，所以终端的用户界面将是唯一的途径。|968033|entityMap|0|LINK|mutability|MUTABLE|url|https://invisible-island.net/xterm/ctlseqs/ctlseqs.html|1|https://man7.org/linux/man-pages/man7/charsets.7.html|2|https://en.wikipedia.org/wiki/Extended_Unix_Code^0|C|1J|0|0|4|B|1|0|4|7|2|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|D|3|E|5|6|7|X|8|@]|9|@$A|Y|B|Z|1|10]]|C|$]]|$1|F|3|G|5|6|7|11|8|@]|9|@$A|12|B|13|1|14]]|C|$]]|$1|H|3|-4|5|6|7|15|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]|P|$5|K|L|M|C|$N|Q]]|R|$5|K|L|M|C|$N|S]]]]

Examination of <a href="https://invisible-island.net/xterm/ctlseqs/ctlseqs.html" rel="nofollow noreferrer">https://invisible-island.net/xterm/ctlseqs/ctlseqs.html</a>, the xterm control character documentation, shows that it follows the ISO 2022 standard for character set switching. In particular ESC % G selects UTF-8.
So to force the terminal to use UTF-8, this command would need to be sent. I find no way of querying which character set is currently in use, but there are ways of discovering if the terminal supports national replacement character sets.
However, from <a href="https://man7.org/linux/man-pages/man7/charsets.7.html" rel="nofollow noreferrer">charsets(7)</a>, it doesn't look like GBK (or GB2312) is an encoding supported by ISO 2022 and xterm doesn't support it natively. So your best bet might be to use iconv to convert to UTF-8.
Further <a href="https://en.wikipedia.org/wiki/Extended_Unix_Code" rel="nofollow noreferrer">reading</a> shows that a (significant) subset of GBK is EUC, which is a ISO2022 code, so ISO2022 capable terminals may be able to display GBK natively after all, but I can't find any mention of activating this programmatically, so the terminal's user interface would be the only recourse.

Now I change my gnome-terminal's character encoding to "GBK" (default it is UTF-8), but how can I get the value(character encoding) in my Linux?

How to get terminal's Character Encoding

Python

Linux

现在我将gnome-terminal的字符编码更改为"GBK“(默认为UTF-8)，但是如何在Linux中获取该值(字符编码)？

问如何获取终端的字符编码
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