* Filename

FNAME=$1

CASE1="${FNAME%%.*}"


BNAME="${FNAME%.*}"

CASE3="${FNAME#*.}"

BEXTN="${FNAME##*.}"

echo "CASE1 = $CASE1"
echo "CASE3 = $CASE3"


echo "BNAME = $BNAME"
echo "BEXTN = $BEXTN"


* Basic Tutorial

    https://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO.html#toc14

* List of test condition options

    https://kapeli.com/cheat_sheets/Bash_Test_Operators.docset/Contents/Resources/Documents/index

    -e   --> file exists
    -z   --> string is null
    -n   --> string is not null




* $#  --> number of args
  $@  --> list of args  (not including $0)
  $0  --> arg 0  (name of program)
  $1  --> arg 1


  if [ -z "$2" ]; then

      (code)

  else

      (code)

  fi

  for arg in "$@"
  do

    code

  done

  echo "Total Args : $#"