Shell Programming and Scripting

#!/usr/bin/ksh  # or bash or dash or ...
for f  in  [0-9]*.xls
do
        f2=$( echo "$f" | tr -d "[0-9]_" )
        [ -f "$f2" ] && echo "$f2 exist" && continue
        [ -d "$f2" ] && echo "$f2 dir exist" && continue
        mv "$f" "$f2"
done

#! /bin/bash
# clean.sh

for file in *.xls; do
    filename=${file%.*}
    file_clean=`echo $filename | tr -d "[:digit:]_" `
    final="$file_clean.xls"
   mv "$file" "$final" 
   echo $final

done

#!/usr/bin/ksh  # or bash or dash or ...
for f  in  [0-9]*.xls
do
         notfirst=${f#*_}
         notlast=${notfirst%_*}
         f2=$notlast.xls
         [ -f "$f2 ] && echo "$f2 exist" && continue
         [ -d "$f2 ] && echo "$f2 dir exist" && continue
         echo "mv $f => $f2"
         mv "$f" "$f2"
done

notfirst=${f#*_} notlast=${notfirst%_*}