UNIX for Dummies Questions & Answers

#! /bin/bash
#get directory contents
for file1 in $1
        for file2 in $1
                if [ -f file1 && -f file2 ] then
                        if [ cmp file1 file2 ] then
                                #delete accordingly
                                #create hard link
                        fi
                fi

cksum $1/* | sort -n > cksum.lis   # duplicate files have the same checksum
oldcksum=0
while read cksum sz fname
do
    if [ "$oldcksum" = "$cksum" ] ; then
           rm $fname
    else
        oldcksum=$cksum
    fi 
done  < cksum.lis