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I didn't get an answer but I wasn't doing anything and this is an interesting topic. In Ubuntu 12.04, when opening a file in gedit or if I am working on the command line in dpkg, I get returned the error "locale not supported, falling back to default "C" libraries", and the one below,

Gtk-WARNING **: Locale not supported by C library.
    Using the fallback 'C' locale.
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Your locales appear to be broken. How did you install Ubuntu exactly? It seems like you installed it in a way that locales aren't configured properly. Please provide some more information regarding that in your question (edit it). And no, the C locale is where it falls back to if no localisation is available. It's from the C programming language. –  gertvdijk Oct 16 '13 at 8:55
    
thanks for the reply. My Ubuntu install is a folder inside of the Windows directory. I know why I installed it there. I was lazy at install and allowed the Linux demon do that part for me. –  Diogenes Lantern Oct 16 '13 at 9:03

2 Answers 2

up vote 5 down vote accepted

First make sure your library language is installed sudo apt-get install language-pack-en-base, for example.

Then, as superuser, shorten the work by allowing Ubuntu to automatically configure them:

sudo dpkg-reconfigure locales

Check your setup, if it's correct then good. But if you have the LANG= or LANGUAGE= settings blank, run this in command line:

locale -a

Which generates the locales installed and available to you.

Choose the locale from the output generated that fits your situation, and export that setting to replace your locales, for example:

export LC_ALL="en.utf-8"

For manual installation use export to set locale by hand which will manually install custom locales, first run the set up as above.

Then, say you want to install "en_us-8" for language but have need for another locale for NUMERIC and TIME, you may wish to use "en_NZ.utf-8" (remember: these are case-sensitive) or LANGUAGE="en_GB.utf-8" and NUMERIC="en.dk.ISO-8859-15". Traveling to New Zealand, I could change the locale LANGUAGE="en.NZ". For Germany, I would just need to install the locales pkg for it and input, in terminal, like the examples below:

export LC_ALL="en_US"
export LANG="en_US"
export LANGUAGE="en_NZ"
export C_CTYPE="en_US"
export LC_NUMERIC=
export LC_TIME=en"en_US"

LC_ALL= may remain empty.

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first:

sudo apt-get purge locales

then:

sudo aptitude install locales

and the famous:

sudo dpkg-reconfigure locales

This rids the system of locales, then re-installs locales and downgrades libc6 from 2.19 to 2.13 which is the issue. Then configures locales again.

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