How to get the File Name, Extension of the File , the File Path under shell

gistfile1.txt

1.How to get the File Name
  test_full_file_path="/home/doc/myfile.txt"
  file_name=`basename ${test_full_file_path}`

or
  file_name=${test_full_file_path##*/}

2.How to get the extension of the file
  test_full_file_path="/home/doc/myfile.txt"
  file_name=`basename ${test_full_file_path}`
  extension_name=${file_name##*.}

3.How to get the file name without the extension
  test_full_file_path="/home/doc/myfile.txt"
  file_name=`basename ${test_full_file_path}`
  file_name_without_extinsion=${file_name%.*}

4.How to get the File Path
  test_full_file_path="/home/doc/myfile.txt"
  file_path=${test_full_file_path%/*}


【##】:the longest string that matches the pattern from the front of the original string will be deleted
【%】: the shortest string that matches the pattern from the back of the original string will be deleted