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note:spoony:export-lc_all-c

export LC_ALL=C

解决pip install 时locale.Error: unsupported locale setting

在很多的shell脚本中,我们经常会看见某一句命令的前面有一句“LC_ALL=C”
SAR_CMD="LC_ALL=C sar -u -b 1 5 | grep -i average "
这到底是什么意思?
LC_ALL=C 是为了去除所有本地化的设置,让命令能正确执行。
---------------------------------
转帖:http://www.linuxsky.org/doc/newbie/200707/84.html
在Linux中通过locale来设置程序运行的不同语言环境,locale由ANSI C提供支持。locale的命名规则为<</span>语言>_<</span>地区>.<</span>字符集编码>,如zh_CN.UTF-8,zh代表中文,CN代表大陆地区,UTF-8表示字符集。在locale环境中,有一组变量,代表国际化环境中的不同设置:1. LC_COLLATE
定义该环境的排序和比较规则
2. LC_CTYPE
用于字符分类和字符串处理,控制所有字符的处理方式,包括字符编码,字符是单字节还是多字节,如何打印等。是最重要的一个环境变量。
3. LC_MONETARY
货币格式
4. LC_NUMERIC
非货币的数字显示格式
5. LC_TIME
时间和日期格式
6. LC_MESSAGES
提示信息的语言。另外还有一个LANGUAGE参数,它与LC_MESSAGES相似,但如果该参数一旦设置,则LC_MESSAGES参数就会失效。LANGUAGE参数可同时设置多种语言信息,如LANGUANE="zh_CN.GB18030:zh_CN.GB2312:zh_CN"。
7. LANG
LC_*的默认值,是最低级别的设置,如果LC_*没有设置,则使用该值。类似于 LC_ALL。
8. LC_ALL
它是一个宏,如果该值设置了,则该值会覆盖所有LC_*的设置值。注意,LANG的值不受该宏影响。
C"是系统默认的locale,"POSIX"是"C"的别名。所以当我们新安装完一个系统时,默认的locale就是C或POSIX。
"POSIX" :Specifies the minimal environment for C-language translation called the POSIX locale. If setlocale() is not invoked, the POSIX locale is the default
"C" Equivalent to "POSIX".
-----------------------------------
How to view the current locale setting?
# locale
How to change the locale setting?
* Via the CDE login locale
* As a user-specific locale
* As a system default locale
To change the current locale setting, first confirm that the desired locale is
installed on the system with:
# locale -a
de
en_AU
en_CA
en_UK
C
If the desired locale is not in the list, you will need to install the
appropriate packages for that locale. See the Note below for more information
about locale packages.

How to change the locale via the CDE login locale?
On the CDE login banner:
Choose options - languages
Under languages - choose the new locale
The CDE banner will re-cycle and then you can login to the selected locale.

NOTE: If a user has a different default locale set in their environment, the
that locale setting will override the selected CDE login locale.

How to set a user-specific locale?
Note:
For sh, ksh:
# LANG=C; export LANG
# LC_ALL=C; export LC_ALL
For csh:
# setenv LANG C
# setenv LC_ALL C

Note: To set a default locale for a user's environment, set the LANG or LC_*
variables in a user's shell intialization file such as $HOME/.profile or
$HOME/.cshrc
How to change the locale by setting the system default locale?
LANG=C LC_ALL=C Example from the /etc/default/init file: # Lines of this file should be of the form VAR=value, where VAR is one of # TZ, LANG, or any of the LC_* environment variables. LANG=C LC_ALL=C Note: The system must be rebooted after making changes to the /etc/default/init file in order for the changes to take effect. How to verify the locale setting? After setting or changing the locale, verify that the locale is set correctly: Check if the locale is set correctly by running the locale command without any options: # locale LANG=C LC_CTYPE= "C" LC_NUMERIC= "C" LC_TIME= "C" LC_COLLATE= "C" LC_MONETARY= "C" LC_MESSAGES= "C" LC_ALL=C


root@ubuntu:~# locale
locale: Cannot set LC_ALL to default locale: No such file or directory
LANG=en_US.UTF-8
LANGUAGE=
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC=zh_CN.UTF-8
LC_TIME=zh_CN.UTF-8
LC_COLLATE="en_US.UTF-8"
LC_MONETARY=zh_CN.UTF-8
LC_MESSAGES="en_US.UTF-8"
LC_PAPER=zh_CN.UTF-8
LC_NAME=zh_CN.UTF-8
LC_ADDRESS=zh_CN.UTF-8
LC_TELEPHONE=zh_CN.UTF-8
LC_MEASUREMENT=zh_CN.UTF-8
LC_IDENTIFICATION=zh_CN.UTF-8
LC_ALL=

root@ubuntu:~# export LC_ALL=C
root@ubuntu:~# locale
LANG=en_US.UTF-8
LANGUAGE=
LC_CTYPE="C"
LC_NUMERIC="C"
LC_TIME="C"
LC_COLLATE="C"
LC_MONETARY="C"
LC_MESSAGES="C"
LC_PAPER="C"
LC_NAME="C"
LC_ADDRESS="C"
LC_TELEPHONE="C"
LC_MEASUREMENT="C"
LC_IDENTIFICATION="C"
LC_ALL=C

解决mac terminal ssh连接linux乱码问题

一般情况下出现乱码的问题多半是服务器编码和本地Terminal编码不匹配导致的。下面列下解决的思路。

检测本地Terminal编码

Terminal -> Preferences -> Ecodings 查看相应的编码:


mac os x terminal查看编码

从结果来看支付utf-8

查看服务器编码

$ locale
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
LANG=en_US.UTF-8
LC_CTYPE=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=
很奇怪,不知道为什么提示LC_CTYPE和LC_ALL这边两个找不到。其中,与中文输入关系最密切的就是 LC_CTYPE, LC_CTYPE 规定了系统内有效的字符以及这些字符的分类,诸如什么是大写字母,小写字母,大小写转换,标点符号、可打印字符和其他的字符属性等方面。而locale定义zh_CN中最最重要的一项就是定义了汉字(Class “hanzi”)这一个大类,当然也是用Unicode描述的,这就让中文字符在Linux系统中成为合法的有效字符,而且不论它们是用什么字符集编码的。

设置LC_TYPE

因为服务器是运维人员配置,自己只是其中一个登录用户,所以修改用户目录下的 ~/.bash_profile 文件。在末尾增加

export LC_CTYPE=en_US.UTF-8
source重新引入一下或者重新连接登录

$ source ~/.bash_profile
再次查看locale,就正常了

$ 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=
后面新建中文命令,查看带中文的文件就都正常了。

小结

这边还有一个疑问,这里我只是设置了LC_CTYPE=en_US.UTF-8,而不是设置为LC_CTYPE=zh_CN.UTF-8,但是一样可以正常查看中文,非常不解。后续详细了解一下再发上来吧。
本页面的其他翻译:
note/spoony/export-lc_all-c.txt · 最后更改: 2017/05/02 10:28 由 Spoony