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
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.