You see an s instead of x in the file permissions? Linux has some special file permissions called SUID, GUID and Sticky Bit. Know more about them.| Linux Handbook
This nifty online chmod calculator lets you calculate the file permissions in absolute and symbolic modes in a few clicks.| Linux Handbook
This detailed tutorial tells you what are symbolic links, how to create a symbolic links and other important things associated with symlinks.| Linux Handbook
Linux file permissions explained in simpler terms. Also learn how to change the file permissions and ownership in Linux in this detailed beginner's guide.| Linux Handbook
Let's see what are the various kinds of file timestamps in Linux, how to see the timestamps for a file and how to change the timestamps.| Linux Handbook