Shell Programming and Scripting

file=$(ls -tr $EMT*.dat | tail -1) # Select the latest file

file="EMT345.dat"
new=`sed -r "s/^[^0-9]+([0-9]+).+$/\1/" <<<$file`
echo $new
let new=$new+1;
echo $new
>"EMT$new.dat"

newfilename="EMT$(( $(echo $file | sed 's/EMT\([0-9]*\)\.dat/\1/g') + 1)).dat"

my $file= `ls -tr |  tail -1` ;# Select the latest file
print $file;

my $val = $file;
$val =~ s/EMT([0-9]+)[.][a-z]*/\1/ ;


$val=$val+1;
$file = "EMT".$val.".pl";

print $file;

# The start of a filename
file=$(ls -tr $EFT*.dat | tail -1) # Select the latest file
new=sed -r "s/^[^0-9]+([0-9]+).+$/\1/" <<<$file
echo $new
let new=$new+1;
echo $new
>"EFT$new.dat"
!EOF
# End of FTP Process
RESULTS 

file=+ tail -1
+ tail -1
+ ls -tr 3526_337092.dat EFT1234.dat HISTOGRAM200910.dat Histogram_200910.dat eluppdtop.dat idoc.dat lockbox_payments.dat
+ ls -tr 3526_337092.dat EFT1234.dat HISTOGRAM200910.dat Histogram_200910.dat eluppdtop.dat idoc.dat lockbox_payments.dat
EFT1234.dat # Select the latest file
new=sed -r "s/^[^0-9]+([0-9]+).+$/\1/" <<<
echo 
let new=+1;
echo 
>"EFT.dat"

file="EMT345.dat"
new=`sed -r "s/^[^0-9]+([0-9]+).+$/\1/" <<<$file`
echo $new
let new=$new+1;
echo $new
>"EMT$new.dat"

newfilename=EMT$(($(echo $file | tr -cd [0-9])+1)).dat

ls -tr | tail -1

ls -t | head -1