Drwxr-xr-x 2 root root 4096 06-29 14:30 Test fragment explanation

D: This should be a catalogue.

then 2 is the number of files .
Rwxr-xr-x Here is a three-paragraph explanation. R means readable w means writable x means run
rwx represents the permissions of the file owner
R-x represents the permissions of the group that the file owner resides in
R-x means other people's permissions
First Root user
Second root user group
4096 is the file size
06-29 14:30 is the creation time
test file name

Drwxr-xr-x 2 root root 4096 06-29 14:30 Test fragment explanation