Q. How do I format date to display on screen on for my scripts as per my requirements?

A. You need to use standard date command to format date or time for output or to use in a shell script.

Syntax to specify format
date +FORMAT Read more …

Mar 09 2010

Setting up DomainKeys on Centos

This is a quick walk through on how to set up domain keys on Centos 5 using sendmail. It should also be very similar for Redhat or Fedora.

Domainkeys is a method mostly used by yahoo to verify that the sender of an email is valid. I did notice that gmail changes the domainkeys header line to a pass value but I don’t know if they block/accept mail based on that. Read more …

Dec 18 2009

Setup a transparent proxy with 3 easy steps

First, Squid server installed (use up2date squid) and configured by adding following directives to file:
# vi /etc/squid/squid.conf

Read more …

Dec 09 2009

Optimizing Sendmail

Most of them involve changing the daemon’s configuration in /etc/sendmail.mc and rebuilding sendmail.cf

Specific things that can affect performance:

dnl # Sendmail, Chap 24.9.13, Page 955
dnl # Disable re-write of queue control file (will result in duplicates
dnl #   if the daemon is interrupted during a delivery)
define(`confCHECKPOINTINTERVAL’,`0′)dnl Read more …

Nov 24 2009

HTPasswd Tutorial

If you would like to have a set of web pages that are protected, requiring a username/password to gain access, this tutorial will show you how to set it up. This is geared towards the Unix Apache httpd servers used on holly, lamar, and www.colostate.edu. If you are using another web server, you’ll need to check that server’s documentation to see how to do this.

Read more …