Some of six kinds of permissions Linux
. 1, rwx
2, the umask default permissions
. 3, ACL
. 4, the sudo
. 5, the sbit SGID SUID
. 6, the chattr (root privileges may be restricted)
supplement:
ACL: to address customer files inadequate identity
after ACL permissions recursively once, the inevitable emergence of permissions overflow
sudo: privilege given to the more detailed, the smaller the rights of ordinary users to get
Special privileges:
the SUID: only for the executable file
SGID: both for executable files, but also for the directory.
SBIT: only for directory