Dear all

for one of my folders in linux centos i set group permission rwx. in this situation all files and folders that are exist inherit all permission from parent directory. but when i create new Directory, it doesn't inherit permission from parent. How to force new files and folders to inherit all permission from their parent??

Best Wishes

supposing you are using bash shell, you want the "umask" command, which is documented in the bash manpage.

man bash

Dear snooly

i think "umask" is global command. let me explain whole problem. i have 3 ftp users A,B & C. all of them are belong to group named "ftp-images". and default primary ftp folder for all 3 user is one location. permission for root folder is:

File ---------------------------------
Path: /var/www/html/images
Type: Directory
Size: 4096
Modified: Wed Sep 28 14:28:32 2011
--------------------------------------
Permissions---------------------------
User: (selected)Read (selected)Write (selected)List
Group: (Selected)Read (selected)Write (Selected)List
other: (Selected)Read (selected)Write (Selected)List
sticky: (unselected) Only owners can delete files
Octal: 2777
--------------------------------------
Ownership-----------------------------
User: root
Group: ftp-images
Setgid: (Selected) Files inherit group
--------------------------------------
Apply changes to----------------------
This directory only
--------------------------------------

in this situation when user A created Directory "A" it's permission is:

User: (selected)Read (selected)Write (selected)List
Group: (Selected)Read (unselected)Write (selected)List
other: (Selected)Read (unselected)Write (selected)List
-------------------------------------------------------------------

and other users "B & C" can view inside Directory A but cannot copy anythings into it.

The answer is still umask. The details depend on which ftp software and which operating system you are using.

i using Filezilla client and Linux os is CentOs 5.6

The umask setting will mask out some of the permissions bits. For ownership and permissions of new subfolders and files, look at using acls.

facl -m u:<username>:rwx
facl -m d:u:<username>:rwx

You need to do both the user and default user. The first gives permissions to access the directory, the second causes new files and directories to inherit the ownership/group/permissions of the parent.
To do the same for group ownership/permissions, use `g' instead of 'u' in the command.

One note: The filesystem needs to be a Linux filesystem that supports ACLs, and you need to add "acl" to the mount options.