Archive for November, 2007

Running traceroute on the Windows OS

No Comments »

First, in order to run traceroute on the Windows box you need to launch a command prompt or DOS console.

Type ‘cmd’ and hit enter in Start->Run

To run Traceroute under the Windows you must use traceroute’s command line utility

tracert

traceroute help:

C:Documents and SettingsAdministrator>tracert

Usage: tracert [-d] [-h maximum_hops] [-j host-list] [-w timeout] target_name

Options:
-d Do not resolve addresses to hostnames.
-h maximum_hops Maximum number of hops to search for target.
-j host-list Loose source route along host-list.
-w timeout Wait timeout milliseconds for each reply.

for example to trace the network path… Read the rest of this entry »


Mailscanner and default Spamassassin fills up /var space

No Comments »

If you are installing Mailscanner and Spamassassin from source or some RPMs it’s been know to use Bayesian statistics engine with it’s database kept forever. This fills up /var/spool/MailScanner/spamassassin folder pretty quickly if you have a moderate load SMTP incoming server. To fix this problem and rebuild Bayesian filters you need to change the following value in /etc/MailScanner/MailScanner.conf file

find the following setting:

Rebuild Bayes Every = 0

and replace it with

Rebuild Bayes Every = 12000

This will rebuild Bayesian spamassassin database/files every 200 minutes. You can of course aim for a higher value if you have enough disk… Read the rest of this entry »


Server Load Optimization with Content Delivery Network

No Comments »

It would be great if web hosting can be done with just one or two servers backing up each other with all the bandwidth one needs and having all the loads and traffic going through them. But that is really not ideal not anywhere close to what is real. With the growth of the World Wide Web and the traffic going through the net, server hosts just could not keep up with very large web sites or blogs. The way has been described by a few computing gurus in the past when they eschewed the use of neural networking architectures… Read the rest of this entry »


Self hypnosis for more success

No Comments »

Unfortunately, most of us are already masters of self-hypnosis. How many times a day do we mutter to ourselves, “That was stupid” or I’ cant believe you made such a mistake” or “now look what you’ve done”? These are all ways of giving us feedback that reinforces our behavior, which is a good working definition of self-hypnosis. However, we currently use this technique routinely to reproach ourselves. Little wonder mistakes are made.

It is time to use this technique to reinforce the positive elements that we need to incorporate into out daily lives to improve ourselves. Many individuals believe that… Read the rest of this entry »


Recipient addresses must be specified on the command line or via the -t option

5 Comments »

Many folks have been getting the error message sending email using php’s mail() function on Fedora, Red Hat Enterprise and Centos boxes, possible many others.

This error usually happens if you are using Postfix or Sendmail MTA. The error shows up in the maillog file as follows:

postfix/sendmail: fatal: Recipient addresses must be specified on the command line or via the -t option

You can fix this problem by editing sendmail_path value in php.ini file and commenting the following line (possible, making the changes to it as shown below)

sendmail_path = /usr/sbin/sendmail -t

Restart Apache… Read the rest of this entry »