change file names to upper case shell script

for i in ` ls -lrt *.jpg|awk '{print $9}'`; do j=`echo $i | tr '[a-z]' '[A-Z]'`;`mv $i $j`; done

 

#!/bin/sh

 for i in *

 do

 j=`echo $i | tr '[A-Z]' '[a-z]'`

 mv $i $j

 done

or in ksh:

 

 #!/bin/ksh

 typeset -l L

 for i in * do

    L=$i

    mv $i $L

 done

 

# for file in *

                    do

                                        echo $file|tr '[a-z]' '[A-Z]'

               done