Module 0179: Linux user access control
Tak Auyeung, Ph.D.
July 30, 2009
1
About this module
2
The necessity of access control
3
The three (four) owners
3.1
‘U’ for user
3.2
‘G’ for group
3.3
‘O’ for others
3.4
And then there is root
4
The three (or so) permissions
4.1
First, a word about directories
4.2
Read
4.3
Execute/Access
4.4
Write
4.5
Other permissions/flags
5
Interesting examples
5.1
System executable files
5.2
System password file
6
Summary