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Shell Programming and Scripting

Date format conversion

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# 1  
Old 10-24-2011
Java Date format conversion
Hi All,

Can someone please let me know how can i convert the date format in unix as follow:
Code:
From: 24 Oct 2011
i.e $(date +'%d %b %Y')


To: 111024
i.e $(date +%y%m%d)

Thanks in advance
# 2  
Old 10-24-2011
echo '24 Oct 2011' | nawk -f david.awk
david.awk
Code:
BEGIN {
 mon="JAN|FEB|MAR|APR|MAY|JUN|JUL|AUG|SEP|OCT|NOV|DEC"
  monN=split(mon, monA, "|");
  for(i=1; i<=monN; i++) {
     monA[monA[i]]=i;
     delete monA[i];
  }
}
{
     print substr($3,3) sprintf("%02d",monA[toupper($2)]) sprintf("%02d", $1)
}

# 3  
Old 10-24-2011
if your date command supports -d option.
Code:
date -d "24 Oct 2011"  +%y%m%d
111024

# 4  
Old 10-25-2011
If not GNU date ..
Code:
$ echo "24 Oct 2011" | 
   nawk ' { months="  JanFebMarAprMayJunJulAugSepOctNovDec";date=$1;month=index(months,substr($2,1,3))/3;
   year=$3; printf("%s%02s%02s\n",year,month,date)}'
20111024

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