Setting the locale

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Use the export command to set the locale.

The following command sequence: 
LANG=C
export LANG

sets the default locale to C (that is, C is used unless a given variable, such as LC_COLLATE, is explicitly set to something else).

The following sequence: 
LC_ALL=C
export LC_ALL

forcibly sets all the locale variables to C, regardless of previous settings.

For a report on the current settings of the locale variables, type locale.