LinuxPrivilege.md

File(Static)

ACL(Access Control Lists)

ACL define more fine-grained discretionary access rights for files and directories.
The permissions defined by ACLs are a superset of the permissions specified by the file permission bits.

File permissions	ACL Entry type
owner	ACL_USER_OBJ
group	ACL_MASK/ACL_GROUP_OBJ
others	ACL_OTHER_OBJ

File permissions

drwxr-xr-x (ls -l)

1. The first character shows the file type.
   - - Regular file.
   b - Block special file.
   c - Character special file.
   d - Directory.
   l - Symbolic link.
   n - Network file.
   p - FIFO.
   s - Socket.
2. The next nine characters are showing the file permissions.The first three characters are for the user, the next three are for the group, and the last three are for others.
   r - Permission to read the file.
   w - Permission to write to the file.
   x - Permission to search/execute the file.
   s - setgid bit.
   t - sticky bit.

Process/thread(dynamic)

Linux capabilities