$ locale charmap
UTF-8
$ locale -a
C
C.UTF-8
en_AG
en_AG.utf8
en_AU.utf8
en_BW.utf8
en_CA.utf8
en_DK.utf8
en_GB.utf8
en_HK.utf8
en_IE.utf8
en_IL
en_IL.utf8
en_IN
en_IN.utf8
en_NG
en_NG.utf8
en_NZ.utf8
en_PH.utf8
en_SG.utf8
en_US.utf8
en_ZA.utf8
en_ZM
en_ZM.utf8
en_ZW.utf8
POSIX
ru_RU.utf8
ru_UA.utf8
$ locale -m
ANSI_X3.110-1983
ANSI_X3.4-1968
...
UTF-8
VIDEOTEX-SUPPL
VISCII
WIN-SAMI-2
WINDOWS-31J
$