Can someone tell me why there are four file permission numbers instead of three?
6764
How do file permissions work?
108697
Folder keeps changing back to read-only. What permissions setup causes this in Windows?
99053
Why does chmod succeed on a file when the user does not have write permission on parent directory?
75745
Understanding permissions properly for cp
7135
Why does the group need --x permission on the parent directory?
151080
What is the first number for in a 4-number chmod argument (such as `chmod 4555`)?
102960
How do file permissions work for the "root" user?
155625
Why can't I change the permissions of files I have access to?
50538
Why does chmod +w not give write permission to other(o)
37411
How do I change the number of open files limit in Linux?
37733
What does last dot in the file permission attribute mean?
139185
Write-only permission for a directory doesn't allow to rename (move) files inside?
21563
How to change permissions for a folder and its subfolders/files in one step?
88898
How can I change the permissions of a folder from create or delete to list files only on a NTFS partition?
131078
Owner of directory set to 518?
66986
Losing permissions by adding capability?
157302
Are user files still private when two sudo users exist in Ubuntu?