Shell Programming and Scripting

cat ~/text.xt | while read line

do
        echo ${line} | perl -pe 's/(\d+)/localtime($1)/e'
done

[1352265804] SERVICES ................. 
[1352265804] SERVICES .................

Thu Jan  1 00:00:01 1970 SERVICES .................
Thu Jan  1 00:00:01 1970 SERVICES .................

while read line; do
  ...
done < file

perl -pe 's/(\d+)/localtime($1)/e' ~/text.xt