Bash Script: File Type Checker and Manipulation

This is a Bash script that prompts the user to input a filename and then checks the type of the file. If the file does not exist, it creates it. If it is a directory, it deletes it and creates a new one. If it is a regular file, it deletes it. If it is neither a directory nor a file, it exits the script.

Here is a breakdown of what each line does:

• PATH=/root/test: sets the PATH environment variable to '/root/test'
• export PATH: exports the PATH environment variable so that it is available to child processes
• echo -e 'Please input a filename,I will check the filename's type': prints a message asking the user to input a filename
• read -p 'Input a filename:' filename: prompts the user to input a filename and stores it in the variable filename
• if[test ! -e '$filename' ]; then: checks if the file does not exist
• touch '$filename': creates the file if it does not exist
• elif[test -d '$filename' ]; then: checks if the file is a directory
• rm -rf '$filename': deletes the directory if it exists
• mkdir '$filename': creates a new directory with the same name
• elif[test -f '$filename']; then: checks if the file is a regular file
• rm -rf '$filename': deletes the file if it exists
• else: if the file is neither a directory nor a file
• exit 0: exits the script with a status of 0 (success)