Shell determines whether a file exists

Example




     


The difference between-E and-F is that-F stands for regular files (regular file), and-E represents all types of files

Refer to the following:

-e filename true if filename exists

-F filename True if filename is a regular file
-L filename True if filename is a symbolic link


-x filename If filename is executable, true
-S filename true if the length of the file is not 0
-H filename True if the file is a soft link

Shell determines whether a file exists