Linux permission management

Address: http://www.cnblogs.com/feisky/archive/2009/11/15/1603295.html

/Etc/passwdRecord account information, but do not save Password

/Etc/shadowSave User Password

/Etc/groupSave allGroupName

 

Ls-lView Permissions: R w x S

Corresponding number:4 read, 2 Write, 1 run.

Special permissions: 4 is SUID, 2 is SGID, and 1 is sticky bit

SPermission: run with the owner permission

Directory sticking bitT:777But you can only delete your own files.

 

 Ls-DL/tmp/

Drwxrwxrwt 518 Root 499712/tmp/

[Permission][LINK] [owner] [group] [Size] [Modification date][Name]

 

Note: For FilesRwxIt refers to the ability to read and write files or execute files.,This does not include deleting the file;

For directories,RYou can read the file list,XYou can enter the directory (RXThe permission must exist at the same time .)WYou can add or delete files or subdirectories in this directory.

 

 

Change permissions:Chmod chown chgrp

Chmod-A | u | G | O + |-| = r | w | x

A = All, u = user, G = group, O = Other

+ Add permissions

-Delete Permissions

 

Special permissions:

Chattr: chattr + I file1Indicates files that cannot be modified,RootIt cannot be modified.

Chattr +Indicates that it cannot be deleted or modified, but can only be added (such as log files)

ViewIAttribute:Lsattr

 

SudoPermission:

Configuration File/Etc/sudoersOnly availableMongodoEdit (requiredRoot)

 

Access Control List:

Setfacl

Getfacl

 

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