Month: March 2007

    1 import java.security.*;
    2 import java.math.*;
    3 
    4 public class MD5 {
    5    public static void main(String args[]) throws Exception{
    6       String s="This is a test";
    7       MessageDigest m=MessageDigest.getInstance("MD5");
    8       m.update(s.getBytes(),0,s.length());
    9       System.out.println("MD5: "+new BigInteger(1,m.digest()).toString(16));
   10    }
   11 }

This works on most systems. First download the updated DST packages:
wget 'ftp://elsie.nci.nih.gov/pub/tz*.tar.gz'

Extract and compile the utilities:

tar -zxvvf tzco*
tar -zxvvf tzda*
make


Now compile the data:

mkdir temp
./zic -d temp northamerica


Verify the new data file is correct:

./zdump -v temp/EST5EDT | grep 2007
/etc/localtime Sun Mar 11 06:59:59 2007 UTC = Sun Mar 11 01:59:59 2007 EST isdst=0
/etc/localtime Sun Mar 11 07:00:00 2007 UTC = Sun Mar 11 03:00:00 2007 EDT isdst=1
/etc/localtime Sun Nov 4 05:59:59 2007 UTC = Sun Nov 4 01:59:59 2007 EDT isdst=1
/etc/localtime Sun Nov 4 06:00:00 2007 UTC = Sun Nov 4 01:00:00 2007 EST isdst=0


Verify your old settings really are incorrect:

./zdump -v /etc/localtime | grep 2007
/etc/localtime.old Sun Apr 1 06:59:59 2007 UTC = Sun Apr 1 01:59:59 2007 EST isdst=0
/etc/localtime.old Sun Apr 1 07:00:00 2007 UTC = Sun Apr 1 03:00:00 2007 EDT isdst=1
/etc/localtime.old Sun Oct 28 05:59:59 2007 UTC = Sun Oct 28 01:59:59 2007 EDT isdst=1
/etc/localtime.old Sun Oct 28 06:00:00 2007 UTC = Sun Oct 28 01:00:00 2007 EST isdst=0


Now install the new file:

cd /etc
mv localtime localtime.old
cp ~/asdf/temp/EST5EDT localtime
#Verify correct installation:
./zdump -v /etc/localtime | grep 2007
/etc/localtime Sun Mar 11 06:59:59 2007 UTC = Sun Mar 11 01:59:59 2007 EST isdst=0
/etc/localtime Sun Mar 11 07:00:00 2007 UTC = Sun Mar 11 03:00:00 2007 EDT isdst=1
/etc/localtime Sun Nov 4 05:59:59 2007 UTC = Sun Nov 4 01:59:59 2007 EDT isdst=1
/etc/localtime Sun Nov 4 06:00:00 2007 UTC = Sun Nov 4 01:00:00 2007 EST isdst=0


Note, for some reason zdump will give incorrect output if you are in the same directory as the file you’re attempting to dump. For example “zdump -v localtime | grep 2007” won’t return anything. I also ran into some cases where specifying the path to the file as temp/EST5EDT didn’t work either, so try to always specify the full path to the file: “zdump -v /etc/loclaltime …”.