#!/bin/bash
 for FILENAME   in /u01/oracle/domains/custom.log

 while :

   do
    FILESIZE=$(stat -c%s "$FILENAME")

        if [[ $FILESIZE > 1000000 ]] ;then
        echo "$FILENAME is too large = $FILESIZE bytes."
        > $FILENAME
        fi
     sleep 2m
    done
  exit 0

./ScriptCustom.sh: line 4: syntax error near unexpected token `while'
./ScriptCustom.sh: line 4:  `while :'