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Full Discussion: File permission
Operating Systems Linux Ubuntu File permission Post 302550508 by Corona688 on Friday 26th of August 2011 02:41:08 AM
Old 08-26-2011
You don't have to cd to do things. / in parameters isn't restricted.

Code:
nano path/to/file

mv /path/to/this path/to/that

This won't restrict him from editing things outside of drupal though. You could use user file ownership and permissions to do that.

Come to think of it, the whole "restrict to one directory" thing is a bit of a red herring for any operating system with relative and absolute paths. Any user can cd into /usr/, but can they edit files in there? Probably not. Any user can create files in /tmp/, but do they cd into /tmp/ when they do so? Probably not. cd is just a convenience, file permissions are what control the actual security.

Better to consider file ownership than what directory he's in. You could make him use a limited user where the drupal folder and things in it belong to his user. He could cd other places, but so what? He wouldn't be able to accomplish much by doing so.

Last edited by Corona688; 08-26-2011 at 03:53 AM..
 

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INNCHECK(8)						      System Manager's Manual						       INNCHECK(8)

NAME
inncheck - check inn configuration and database files. SYNOPSIS
inncheck [ -a ] [ -v ] [ -pedantic ] [ -f ] [ -perm ] [ -noperm ] [ file=value | file ] DESCRIPTION
Inncheck examines various configuration files and databases and verifies things about them. Things verified depend on the file being checked, but generally are things like permissions, ownership, syntax errors in config files etc. Inncheck does not make changes to any files -- it just reports what it thinks may be wrong, and it is up to the operator to fix the prob- lem. The set of files checked may be restricted by using file or file=value arguments. For example, putting hosts.nntp causes only the hosts.nntp(5) file to be checked. Using hosts.nntp=/tmp/hosts.nntp.tst on the command line will cause inncheck to only verify the hosts.nntp file, and it will perform the checks on the file /tmp/hosts.nntp file instead of the default one. Valid values for file are: active control.ctl expire.ctl hosts.nntp inn.conf moderators newsfeeds overview.fmt nnrp.access nntpsend.ctl passwd.nntp OPTIONS
-a If any ``file'' value or ``file=value'' pairs (see below) are given, then normally only the files they refer to are checked. Use the ``-a'' flag to specify that all files should be checked regardless. In this case the form file=value will be the more useful. -v Use the ``-v'' option to get more verbose output. -pedantic Use the ``-pedantic option to get reports on things that are not necessarily wrong, but may indicate a bad configuration -- such as inn.conf(5) missing a key. -f Use the ``-f'' flag to have inncheck print the appropriate chown/chgrp/chmod command necessary to fix a problem that it reports. Any other output lines will be prefixed with a ``#'' character to make the output be valid input for a shell. Note that the ``-perm'' flag must be used as well when using this flag. -perm Inncheck checks all files for permission problems. If the ``-perm'' flag is used, then only the files specified by the file or file=value command line arguments will be checked for problems other than permission problems. -noperm To avoid doing any checking of file permissions or ownership, use the ``-noperm'' option. EXAMPLES
To have inncheck check all files for syntax and permission problems simply: inncheck To have inncheck check all files for permission problems and to verify the syntax of the active and hosts.nntp files do: inncheck -perm active hosts.nntp To have inncheck check the test newsfeeds file in /var/tmp/newsfeeds.testing, do: inncheck newsfeeds=/var/tmp/newsfeeds.testing To have inncheck check all the files as it normally does, but to specify a different location for the newsfeeds file, so: inncheck -a newsfeeds=/var/tmp/newsfeeds.testing BUGS
If the ``-f'' and ``-perm'' options are used together, along with -a or some ``file'' or ``file=value'' arguments that refer to a file with a syntax problem, then the output will no longer be valid input for a shell. HISTORY
Written by Brendan Kehoe <brendan@cygnus.com> and Rich Salz <rsalz@uunet.uu.net> This is revision 1.1, dated 1996/10/29. SEE ALSO
active(5), expire.ctl(5), history(5), hosts.nntp(5), inn.conf(5), newsfeeds(5) INNCHECK(8)
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