Linux Tutorials on the topic “linux”

  • How To Add Two-Factor Authentication To phpBB

    Author: nowenTags: , , , , Comments: 0

    How To Add Two-Factor Authentication To phpBB This document describes how to add WiKID two-factor authentication to phpBB through Apache using mod_auth_xradius. Given the recent attack against phpBB and the exposure of it's users' passwords, we thought two-factor authentication might be timely.

  • Blocking IP Addresses Of Any Country With iptables

    Author: marchostTags: , Comments: 16

    Blocking IP Addresses Of Any Country With iptables This article explains how you can block IP addresses of any country with the help of iptables.

  • IP Address Geolocation From MySQL

    Author: marchostTags: , Comments: 9

    IP Address Geolocation From MySQL In this short tutorial I will use a local MySQL database to do IP addresses geolocation.

  • pkgwatch -- A Package Management Wrapper

    Author: tony2Tags: Comments: 11

    pkgwatch -- A Package Management Wrapper In the past I was trying many different linux distros. Each has its own package management systems: debian has apt, mandrake has urpmi, yellowdog has an apt front-end for rpm, suse has yast... While they all are quite similar and not difficult to use, I found that I often made mistakes because I often forgot which system I was using and the exact commands on that system. Another issue is that I wish I could keep track how I installed/removed those packages. So I wrote a simple wrapper for various package management systems.

  • Creating USB Startup Disks From Various Linux Distributions With UNetbootin

    Author: Falko TimmeTags: Comments: 3

    Creating USB Startup Disks From Various Linux Distributions With UNetbootin This guide shows how you can create USB startup disks (on your USB flash drive) from various Linux distributions with UNetbootin. This is useful if you want to install a Linux distribution on a computer that has no CD/DVD drive.

  • How to configure Squid for two-factor authentication from WiKID

    Author: nowenTags: , , Comments: 0

    How to configure Squid for two-factor authentication from WiKID In this guide we will show how Squid can be configured to support two-factor authentication from a WiKID server, allowing users to be centrally authenticated, but their requests still distributed for efficiency.

  • Cloning Linux Systems With CloneZilla Server Edition (CloneZilla SE)

    Author: Falko TimmeTags: Comments: 6

    Cloning Linux Systems With CloneZilla Server Edition (CloneZilla SE) This tutorial shows how you can clone Linux systems with CloneZilla SE. This is useful for copying one Linux installation to multiple computers without losing much time, e.g. in a classroom, or also for creating an image-based backup of a system. I will install CloneZilla SE on a Debian Etch server in this tutorial. The systems that you want to clone can use whatever Linux distribution you prefer.

  • Reducing Disk IO By Mounting Partitions With noatime

    tux Author: Falko TimmeTags: Comments: 9

    Reducing Disk IO By Mounting Partitions With noatime Linux has a special mount option for file systems called noatime. If this option is set for a file system in /etc/fstab, then reading accesses will no longer cause the atime information (last access time - don't mix this up with the last modified time - if a file is changed, the modification date will still be set) that is associated with a file to be updated (in reverse this means that if noatime is not set, each read access will also result in a write operation). Therefore, using noatime can lead to significant performance gains.

  • How To Resize RAID Partitions (Shrink & Grow) (Software RAID)

    tux Author: Falko TimmeTags: Comments: 7

    How To Resize RAID Partitions (Shrink & Grow) (Software RAID) This article describes how you can shrink and grow existing software RAID partitions. I have tested this with non-LVM RAID1 partitions that use ext3 as the file system. I will describe this procedure for an intact RAID array and also a degraded RAID array.

  • Useful Uses Of netcat

    tux Author: Falko TimmeTags: Comments: 8

    Useful Uses Of netcat This short article shows some useful netcat commands. netcat is known as the TCP/IP swiss army knife. From the netcat man page: netcat is a simple unix utility which reads and writes data across network connections, using TCP or UDP protocol. It is designed to be a reliable "back-end" tool that can be used directly or easily driven by other programs and scripts. At the same time, it is a feature-rich network debugging and exploration tool, since it can create almost any kind of connection you would need and has several interesting built-in capabilities.