Jan 192014
 

Article by Rahul Panwar first posted on http://linuxexplore.com/

A chroot on Unix operating systems is an operation that changes the apparent root directory for the current running process and its children. A program that is run in such a modified environment cannot name (and therefore normally not access) files outside the designated directory tree. The term “chroot” may refer to the chroot(2) system call or the chroot(8) wrapper program. The modified environment is called a “chroot jail”. From Wikipedia.

Why it is required? If you want to set up your Linux box as a web hosting server for its users, you may need to give SFTP access. But they can get access to whole system Linux tree, just for reading but still very unsecure. So it is mandatory to lock them in their home directory.

There are many other applications, it’s just a common example, so lets start its configuration.

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Feb 152012
 

Today I want to just give you a pill, but I’m sure that even if is short this article will save a lot of time to someone who, like me, has this requirement.
Having a machine with Linux and various IP (which can be IPv4 and / or ipv6) and a Squid Proxy Server configure your browser to use that proxy on one of these IP and go out from that server with the same IP and not with the default ip .

This can be useful if you have services that require 1 specific IP to be allowed, or if you want to give the proxy server to different people and still be able to trace what they do.
To achieve this we’ll use the ACL, Squid has very good ACL’s (Access Control Lists) built into the squid.conf file, allowing you to lock down or control the access by names, IP’s, networks, time of day, actual day. Remember however that like every firewall the more complicated an ACL is, the slower Squid will be to respond to requests. Continue reading »

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Jan 072012
 

uranosIn the 3 former articles of this series we have saw OCSInventory, Fusion Inventory and GLPI 3 software that can create an asset inventory with your computers hardware and software.

Today we’ll take a look at another software: Uranos (Unattended Resolution in A Nutshell – OS).

Unattended Resolution in A Nutshell – OS is an open source software that will let you perform Asset Management, Monitoring, Software Distribution,Unattended tasks. It’s free for both personal and commercial use and released under GPL license.

The project it’s active and the last version (at the moment of the writing of this post) it’s the 1.1913 released on 22 December 2011

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Zentyal The Linux Small Business Server

Zentyal, formerly known as eBox Platform, is a multi-purpose Linux Ubuntu remastered and it’s based on Ubuntu server 10.04 (LTS). It can function as a network gateway, unified threat manager, office server, infrastructure manager, and a unified communications server. The project’s source code is available under terms of the GNU General Public License, as well [...]

Is your company afraid of Linux? (3 of 3)

Continued from : Is your company afraid of Linux? (Part 2 of 3) Fear #4 (Support!): This is where Linux shines. Because of the open nature of the Linux community it is considered to be the most widely supported platform and the most inexpensive. To get professional support for your Microsoft server platform, you have [...]