file permission

[j773303]

The file permission has 3 pars, that's
user, group, others
Anyone can tell me, what's the others?
Where to reference others permission?

[Paula J Frazer-Campbell]

Hi

This should help:-



A numeric mask replaces the current file mode creation mask. It is specified as an unsigned octal integer, constructed from the logical OR (sum) of the following mode bits (leading zeros can be omitted):

0400 ( a=rwx,u-r) Read by owner
0200 ( a=rwx,u-w) Write by owner
0100 ( a=rwx,u-x) Execute (search in directory) by owner
0040 ( a=rwx,g-r) Read by group
0020 ( a=rwx,g-w) Write by group
0010 ( a=rwx,g-x) Execute/search by group
0004 ( a=rwx,o-r) Read by others
0002 ( a=rwx,o-w) Write by others
0001 ( a=rwx,o-x) Execute/search by others


Paula

[Ramkumar Devanathan]

hi,

Try this in your shell -
$ id
the above will provide you your user id and your group id.

All other users having your group id as theirs too, will enjoy the permissions you set for the group.

All users in general whatsoever their group id, will enjoy the permissions that you set in the others part.

So, it is always best to give minimal permissions (say read only, or if it is an executable file only execution rights) in the others part.

see the following
man umask
man chmod

- ramd.

[Stefan Farrelly]

others means EVERYONE. Ie. all users can access files if the others permission is set (either read, write or execute/entry).

You can use chmod o+r (or +w or +x) to set others permission. If you list a file (wioth ls -l) the others permission is the last 3 digits.

[Paula J Frazer-Campbell]

Hi

Also this:-

http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/B2355-90682/B2355-90682_top.html&con=/hpux/onlinedocs/B2355-90682/00/00/26-con.html&toc=/hpux/onlinedocs/B2355-90682/00/00/26-toc.html&searchterms=owner&queryid=20030411-033932



Paula

[Yogeeraj_1]

hi,

Other (o) - Other refers to everyone except the owner of the file and everyone that is in the group to which the file belongs.

see: http://www.cs.indiana.edu/Facilities/help/permissions.html

regards
Yogeeraj

[Frank Slootweg]

Yogeeraj gave an important detail:

The permissions are *exclusive*, i.e. you are either the owner *or* a member of the group *or* other. So this fails:

$ id
uid=101(franks) gid=101(ftp_group)
$ ll file
-------rwx 2 franks ftp_group 8 Apr 15 14:48 file
$ cat file
cat: Cannot open file: Permission denied
$

I.e. I can not read this file, even while I (franks) am the owner and a member of the group (ftp_group). Why? Because I am *not* in the set "other".

[Ramkumar Devanathan]

Thanks Frank and Yogeeraj - I didn't know that.

- ramd.