You ssh into a server or you enter a chroot, and the console overflows with these messages:

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = "en_US:en",
        LC_ALL = (unset),
        LC_TIME = "en_US.utf8",
        LC_CTYPE = "de_AT.UTF-8",
        LC_COLLATE = "C",
        LC_MESSAGES = "en_US.utf8",
        LANG = "de_AT.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory

Gaaaaarrrrh!

Fortunately the fix is easy (adjust the locale names for your situation):

locale-gen en_US.UTF-8 de_AT.UTF-8

Finally, peace on the console.


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