Solved

How to restrict users to their own home directory

Posted on 1998-08-05
2
367 Views
Last Modified: 2010-05-18
I would like to restrict users to their own home directory , so that they cannot cd to the root and other directories.
This is to be so when they perform ftp or telnet.

Any body can help ?

Thanks.
0
Comment
Question by:keoktay
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 

Accepted Solution

by:
dima_sherman earned 50 total points
ID: 2009206
Hi, first of all, do:
$adduser
this will ask ya for home directory for the user that ya wanna add. if this fails do this.
for non-shadowed
*****************
$ pico /etc/passwd
insert:
<username>::666:666:/home/<username>:/bin/bash
^X(save & quit)
$ mkdir /home/<username>
$ passwd <username> (Change his password quickly!)

for Shadowed
************
$ pico /etc/passwd
insert:
<username>:x:666:666:/home/<username>:/bin/bash
^X(save & quit)
$ pico /etc/shadow
<username>::
^X(save & quit)
$ passwd <username> (Change his password quickly!)
$ mkdir /home/<username>
To check if your system is shadowed do:
$ grep ":0:" /etc/passwd
if the place where the password should be is 'X' = SHADOWED!
now ask your user to login and he will automaticly login to his directory, when he will try to do cd /root he will get 'permission denied', also try to do
$ chmod o-rwx /root
This will make only you the only user (root) who can read, write and execute programs in directory /root.
I hope i've helped ya. :)
btw: DASH LE AVI SHAWA!
0
 
LVL 1

Expert Comment

by:albberat
ID: 2009207

 well what the dima_sherman is saying is quite long. If they have shell access(they use telnet for that) you should change the permissions for every file/directory(build a script or use the umask when creating new files/dirs) and they are not able to change dir(cd now has no value) but if they use telnet(shell access) how they can use "ls" command if the /bin dir can not be reached. in ftp you can use "the dialup user" where the user entry is not anymore in /etc/passwd(shell access is not permitted -- ISP's do this always) and when he logs via ftp he can jump up and down his dirs and he will not see other dirs.
 
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

FreeBSD on EC2 FreeBSD (https://www.freebsd.org) is a robust Unix-like operating system that has been around for many years. FreeBSD is available on Amazon EC2 through Amazon Machine Images (AMIs) provided by FreeBSD developer and security office…
Every server (virtual or physical) needs a console: and the console can be provided through hardware directly connected, software for remote connections, local connections, through a KVM, etc. This document explains the different types of consol…
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.
In a previous video, we went over how to export a DynamoDB table into Amazon S3.  In this video, we show how to load the export from S3 into a DynamoDB table.

707 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question