what is a regular file on unix
I saw the man page of test . where the below is mentioned. -e pathname True if pathname resolves to a file that exists. False if pathname cannot be resolved. -f pathname True if pathname resolves to a file that exists and is a regular file. False if pathname cannot be resolved, or if pathname resolves to a file that exists but is not a regular file. the -f flag says True if pathname resolves to a file that exists and is a regular file Could anybody please tell what is a regular file and what is not a regular file. Non-regular files are devices, pipes, sockets... try [ -f /dev/tty0 ] , for