man ls Then search for --time and you can see that it displays the modification time (mtime) by default.
For directories, it is the last modification time of this directory. And what's in the catalog? File item. That is, the file metainformation you will see when lsing a directory. So the mtime update of the directory means that the files in it are created, deleted, renamed, permissions updated...
ll
should be an alias forls -l
.man ls
Then search for--time
and you can see that it displays the modification time (mtime) by default.For directories, it is the last modification time of this directory. And what's in the catalog? File item. That is, the file metainformation you will see when lsing a directory. So the mtime update of the directory means that the files in it are created, deleted, renamed, permissions updated...
linux does not have the
ll
command, entertype ll
to see what the alias is. Generally speaking, it should bels -l