Fix warning: No support for locale: en_US.utf8
apt-get warning: No support for locale: en_US.utf8
How to reproduce the problem ?
perl -e exit
When it's fix there is no message.
Typical message :
Can't set locale; make sure $LC_* and $LANG are correct! perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LC_MONETARY = "fr_FR.UTF-8", LC_ADDRESS = "fr_FR.UTF-8", LC_TELEPHONE = "fr_FR.UTF-8", LC_NAME = "fr_FR.UTF-8", LC_MEASUREMENT = "fr_FR.UTF-8", LC_IDENTIFICATION = "fr_FR.UTF-8", LC_NUMERIC = "fr_FR.UTF-8", LC_PAPER = "fr_FR.UTF-8", LANG = "en_GB.UTF-8" are supported and installed on your system.
How to fix on raspberry
Ensure you have declared en_US.UTF-8 as required local using, you probably want to configure locals for : en_GB.UTF-8, en_US.UTF-8 and fr_FR.UTF-8
Then as (this part could be also use on mint to fix similar issue)
sudo su - export LANGUAGE=en_US.UTF-8 export LANG=en_US.UTF-8 export LC_ALL=en_US.UTF-8 locale-gen en_US.UTF-8 dpkg-reconfigure locales
How to fix more common solution
Usually this error means that you could have been changing between different languages (locales) and something has caused this to error erroneously.
You could try regenerating your list of locales with
sudo dpkg-reconfigure locales
Result was something like
Generating locales... en_AG.UTF-8... done en_AU.UTF-8... done en_BW.UTF-8... done en_CA.UTF-8... done en_DK.UTF-8... done en_GB.UTF-8... done en_HK.UTF-8... done en_IE.UTF-8... done en_IN.UTF-8... done en_NG.UTF-8... done en_NZ.UTF-8... done en_PH.UTF-8... done en_SG.UTF-8... done en_US.UTF-8... up-to-date en_ZA.UTF-8... done en_ZM.UTF-8... done en_ZW.UTF-8... done Generation complete.
Then resetting your local locale with:
sudo update-locale LANG=en_US.UTF-8 LANGUAGE=en_US.UTF-8 LC_ALL=en_US.UTF-8
i.e. use one of the Locale values in the output above
After reboot check that running don't print any warning message.
sudo update-locale perl -e exit