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FAQ Updates: April/03/2012

Our FAQ section has been updated. Here are latest howtos:

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FAQ Updates – Nov/13/2010

Our FAQ section is updated in last few days with new howtos:

  • Linux Network IP Accounting - I need to know how much data are transmitted on my ppp0 network or eth0 Internet links? How do I set IP accounting by address such as and How do I set IP accounting per Apache virtual domain? How do I set accounting by service port (http, smtp) and protocol (tcp, udp, icmp)? How do I record how much traffic each of the clients computer is using?
  • Linux / UNIX: DNS Lookup Command - How do I perform dns lookup under Linux or UNIX or OS X operating systems without using 3rd party web sites for troubleshooting DNS usage?
  • Linux: Find Out Which Process Is Listening Upon a Port - How do I find out running processes were associated with each open port? How do I find out what process has open tcp port 111 or udp port 7000 under Linux?
  • Google Apps Domain Create SPF Records For BIND or Djbdns - I work for a small business and outsourced our email hosting to Google. However, I noticed that spammers are using our From: First Last to send their spam messages. All bounced messages come to our catch only account. How do I stop this? How do I validate our domain using SPF? How do I configure a SPF for Google Apps domain using BIND 9 or djbdns?
    Mac Os X: Mount NFS Share / Set an NFS Client - How do I access my enterprise NAS server by mounting NFS filesystem onto my Mac OS X based system using GUI and command line based tools?
  • Explains: echo Command (echo $”string”) Double-quoted String Preceded By a Dollar Sign - I noticed that many shell scripts in /etc/init.d/ directory use the following syntax - echo $"Usage $prog start|stop|reload|restart". Why a double-quoted string preceded by a dollar sign ($”string”) using the echo command under Linux / UNIX bash scripts?
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Book Review: Linux Networking Cookbook

Linux networking cookbook is a book for a seasoned Linux network administrator. The book attempts to describe day-to-day networking administration, maintenance and advanced issues commonly faced by us. Book covers wild verity of topics or so called recipes for Linux networking such as:

=> Building Custom Gateways using Soekris 4521 embedded board
=> Linux Firewall
=> Linux based wireless access point
=> Building a VoIP servr with Asterisk
=> Linux Routing
=> Secure remote administration with OpenSSH
=> Setting up VPNs with OpenVPN and PPTP VPN server

Book Review: Linux Networking Cookbook

=> Linux IPv6 Configurations
=> Single sign-on with Samba for nixed Linux/Windows LANs
=> Setting up centralized network directory with OpenLDAP
=> Network Monitoring with Nagios
=> Network Monitoring with MRTG
=> Setting up Linux Dial up server
=> Setting up central Linux network installation server for on demand os reload and much more

I must say Carla has done an astonishing work to put together Linux networking cookbook.

This is not your Linux networking from scratch guide. Linux networking cookbook is a task-oriented book intended to offer solutions to the daily Linux networking problems and goals the Linux networking admin faces. You may be aware of that Linux networking is a complex subject. So if you need one central reference book along with examples, this book is a must for you. Each small how to (read as recipe) comes with a nice example and sample configuration / commands to carry out a task. I'm sure this book will save your precious time and energy.


Sure you will find most of the information mentioned in this book throughout mailing lists, forums, blogs, and discussion groups but not in one handy guide. Overall, a great book that touches all important Linux networking aspects. This book is highly recommended to all Linux networking admins / MCSEs / RHCEs / UNIX admins:


    + Easy of use - Gain new skills
    + Time saving tips
    + Enhance your knowledge
    + Practical advice with tons of working examples


    - N/A
=> Book title: Linux Networking Cookbook (Linux) [ILLUSTRATED] (Paperback)
=> Author: Carla Schroder
=> Publisher: O'Reilly Media, Inc.
=> Pub Date: November 26, 2007
=> ISBN: ISBN-10: 0596102488 / ISBN-13: 978-0596102487
=> Pages: 638 pages
=> Level of experience needed: New - Intermediate user
=> Who will find useful: UNIX/Linux network admin / IDC Tech support staff
=> Additional goodies included (such as CDROM) : No
=> Book ratings: 4/5
=> Purchase online @ Amazon

Linux Shutdown Command and Logfile

In the enterprise Linux setup, it is necessary to keep the track of server shutdown and reboot time. Most of you may have used the shutdown / reboot command.
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