crontab 에서 locale 설정

$ man crontab
...
       Unlike other cron daemons, this crond/crontab package doesn't try to do everything under the sun.  It doesn't try to keep  track  of  user's  pre-
       ferred  shells;  that would require special-casing users with no login shell.  Instead, it just runs all commands using /bin/sh.  (Commands can of
       course be script files written in any shell you like.)
 
       Nor does it do any special environment handling.  A shell script is better-suited to doing that than a cron daemon.  This cron daemon sets up only
       four environment variables: USER, LOGNAME, HOME, and SHELL.
...