perl -e 'print "Hello\n";' perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LC_CTYPE = "UTF-8", LANG = "en_US.UTF-8" are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). Hello I'v tried to do export LC_ALL=en_US.UTF-8 export LANGUAGE=en_US.UTF-8 And it workis, till I log out. Is there any permanent solution?